{"items":[{"id":"NVI-00008149","kind":"vulnerability","title":"Cross site scripting via HTML attributes in the back end","revision":3,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-hr3h-x6gq-rqcp","CVE-2021-35955"],"plain_summary":"OSV carries this publisher advisory for contao/core-bundle, contao/contao, contao/contao, contao/contao, contao/core-bundle. This is an aggregated source copy; consult the original publisher and compare update dates.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"The original advisory lists fixed boundaries 4.4.56 for contao/core-bundle. Confirm the publisher’s latest guidance.","source_ids":["sr-f8103fb906a5fa5fdd8627835dfc2bf1"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 4.4.56 for contao/contao. Confirm the publisher’s latest guidance.","source_ids":["sr-f8103fb906a5fa5fdd8627835dfc2bf1"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 4.9.18 for contao/contao. Confirm the publisher’s latest guidance.","source_ids":["sr-f8103fb906a5fa5fdd8627835dfc2bf1"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 4.11.7 for contao/contao. Confirm the publisher’s latest guidance.","source_ids":["sr-f8103fb906a5fa5fdd8627835dfc2bf1"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 4.9.18 for contao/core-bundle. Confirm the publisher’s latest guidance.","source_ids":["sr-f8103fb906a5fa5fdd8627835dfc2bf1"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 4.11.7 for contao/core-bundle. Confirm the publisher’s latest guidance.","source_ids":["sr-f8103fb906a5fa5fdd8627835dfc2bf1"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-016d151ba18d9a1e5e12d82d8ca96bbb"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"EPSS","as_of":"2026-11-03T12:00:27.000Z","value":"0.557%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.46524. Missing scores are unknown.","source_id":"sr-016d151ba18d9a1e5e12d82d8ca96bbb"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-f8103fb906a5fa5fdd8627835dfc2bf1","url":"https://github.com/advisories/GHSA-hr3h-x6gq-rqcp","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-hr3h-x6gq-rqcp","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:42:20.432Z"},{"id":"sr-016d151ba18d9a1e5e12d82d8ca96bbb","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2021-35955","publisher":"FIRST EPSS","observed_at":"2026-11-03T17:42:56.080Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-f8103fb906a5fa5fdd8627835dfc2bf1"],"technology":"contao/core-bundle","known_exclusions":[],"conditions_summary":"### Impact\n\nIt is possible for untrusted users to inject malicious code into HTML attributes in the back end, which will be executed both in the element preview (back end) and on the website (front end).\n\nInstallations are only affected if there are untrusted back end users who have the rights to modify HTML fields (e.g. TinyMCE).\n\n### Patches\n\nUpdate to Contao 4.4.56, 4.9.18 or 4.11.7\n\n### Workarounds\n\nDisable all fields that allow HTML for untrusted back end users or disable the login for these users.\n\n### References\n\nhttps://contao.org/en/security-advisories/cross-site-scripting-via-html-attributes-in-the-back-end\n\n### For more information\n\nIf you have any questions or comments about this advisory, open an issue in contao/contao.\n\n### Credits\n\nThanks to Mikhail Khramenkov and Moritz Vondano for reporting this security issue.","public_affected_ranges":["ECOSYSTEM: introduced 4.0.0; fixed 4.4.56"]},{"certainty":"source_listed","source_ids":["sr-f8103fb906a5fa5fdd8627835dfc2bf1"],"technology":"contao/contao","known_exclusions":[],"conditions_summary":"### Impact\n\nIt is possible for untrusted users to inject malicious code into HTML attributes in the back end, which will be executed both in the element preview (back end) and on the website (front end).\n\nInstallations are only affected if there are untrusted back end users who have the rights to modify HTML fields (e.g. TinyMCE).\n\n### Patches\n\nUpdate to Contao 4.4.56, 4.9.18 or 4.11.7\n\n### Workarounds\n\nDisable all fields that allow HTML for untrusted back end users or disable the login for these users.\n\n### References\n\nhttps://contao.org/en/security-advisories/cross-site-scripting-via-html-attributes-in-the-back-end\n\n### For more information\n\nIf you have any questions or comments about this advisory, open an issue in contao/contao.\n\n### Credits\n\nThanks to Mikhail Khramenkov and Moritz Vondano for reporting this security issue.","public_affected_ranges":["ECOSYSTEM: introduced 4.0.0; fixed 4.4.56"]},{"certainty":"source_listed","source_ids":["sr-f8103fb906a5fa5fdd8627835dfc2bf1"],"technology":"contao/contao","known_exclusions":[],"conditions_summary":"### Impact\n\nIt is possible for untrusted users to inject malicious code into HTML attributes in the back end, which will be executed both in the element preview (back end) and on the website (front end).\n\nInstallations are only affected if there are untrusted back end users who have the rights to modify HTML fields (e.g. TinyMCE).\n\n### Patches\n\nUpdate to Contao 4.4.56, 4.9.18 or 4.11.7\n\n### Workarounds\n\nDisable all fields that allow HTML for untrusted back end users or disable the login for these users.\n\n### References\n\nhttps://contao.org/en/security-advisories/cross-site-scripting-via-html-attributes-in-the-back-end\n\n### For more information\n\nIf you have any questions or comments about this advisory, open an issue in contao/contao.\n\n### Credits\n\nThanks to Mikhail Khramenkov and Moritz Vondano for reporting this security issue.","public_affected_ranges":["ECOSYSTEM: introduced 4.5.0; fixed 4.9.18"]},{"certainty":"source_listed","source_ids":["sr-f8103fb906a5fa5fdd8627835dfc2bf1"],"technology":"contao/contao","known_exclusions":[],"conditions_summary":"### Impact\n\nIt is possible for untrusted users to inject malicious code into HTML attributes in the back end, which will be executed both in the element preview (back end) and on the website (front end).\n\nInstallations are only affected if there are untrusted back end users who have the rights to modify HTML fields (e.g. TinyMCE).\n\n### Patches\n\nUpdate to Contao 4.4.56, 4.9.18 or 4.11.7\n\n### Workarounds\n\nDisable all fields that allow HTML for untrusted back end users or disable the login for these users.\n\n### References\n\nhttps://contao.org/en/security-advisories/cross-site-scripting-via-html-attributes-in-the-back-end\n\n### For more information\n\nIf you have any questions or comments about this advisory, open an issue in contao/contao.\n\n### Credits\n\nThanks to Mikhail Khramenkov and Moritz Vondano for reporting this security issue.","public_affected_ranges":["ECOSYSTEM: introduced 4.10.0; fixed 4.11.7"]},{"certainty":"source_listed","source_ids":["sr-f8103fb906a5fa5fdd8627835dfc2bf1"],"technology":"contao/core-bundle","known_exclusions":[],"conditions_summary":"### Impact\n\nIt is possible for untrusted users to inject malicious code into HTML attributes in the back end, which will be executed both in the element preview (back end) and on the website (front end).\n\nInstallations are only affected if there are untrusted back end users who have the rights to modify HTML fields (e.g. TinyMCE).\n\n### Patches\n\nUpdate to Contao 4.4.56, 4.9.18 or 4.11.7\n\n### Workarounds\n\nDisable all fields that allow HTML for untrusted back end users or disable the login for these users.\n\n### References\n\nhttps://contao.org/en/security-advisories/cross-site-scripting-via-html-attributes-in-the-back-end\n\n### For more information\n\nIf you have any questions or comments about this advisory, open an issue in contao/contao.\n\n### Credits\n\nThanks to Mikhail Khramenkov and Moritz Vondano for reporting this security issue.","public_affected_ranges":["ECOSYSTEM: introduced 4.5.0; fixed 4.9.18"]},{"certainty":"source_listed","source_ids":["sr-f8103fb906a5fa5fdd8627835dfc2bf1"],"technology":"contao/core-bundle","known_exclusions":[],"conditions_summary":"### Impact\n\nIt is possible for untrusted users to inject malicious code into HTML attributes in the back end, which will be executed both in the element preview (back end) and on the website (front end).\n\nInstallations are only affected if there are untrusted back end users who have the rights to modify HTML fields (e.g. TinyMCE).\n\n### Patches\n\nUpdate to Contao 4.4.56, 4.9.18 or 4.11.7\n\n### Workarounds\n\nDisable all fields that allow HTML for untrusted back end users or disable the login for these users.\n\n### References\n\nhttps://contao.org/en/security-advisories/cross-site-scripting-via-html-attributes-in-the-back-end\n\n### For more information\n\nIf you have any questions or comments about this advisory, open an issue in contao/contao.\n\n### Credits\n\nThanks to Mikhail Khramenkov and Moritz Vondano for reporting this security issue.","public_affected_ranges":["ECOSYSTEM: introduced 4.10.0; fixed 4.11.7"]}],"null_published_at":"2026-11-04T10:04:41.531Z","source_updated_at":"2026-07-08T06:28:14.331Z","source_disclosed_at":"2021-08-25T14:45:01.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.","null_first_observed_at":"2026-10-31T21:42:20.432Z"},{"id":"NVI-00008149","kind":"vulnerability","title":"Cross site scripting via HTML attributes in the back end","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-hr3h-x6gq-rqcp","CVE-2021-35955"],"plain_summary":"OSV carries this publisher advisory for contao/core-bundle, contao/contao, contao/contao, contao/contao, contao/core-bundle. This is an aggregated source copy; consult the original publisher and compare update dates.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"The original advisory lists fixed boundaries 4.4.56 for contao/core-bundle. Confirm the publisher’s latest guidance.","source_ids":["sr-f8103fb906a5fa5fdd8627835dfc2bf1"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 4.4.56 for contao/contao. Confirm the publisher’s latest guidance.","source_ids":["sr-f8103fb906a5fa5fdd8627835dfc2bf1"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 4.9.18 for contao/contao. Confirm the publisher’s latest guidance.","source_ids":["sr-f8103fb906a5fa5fdd8627835dfc2bf1"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 4.11.7 for contao/contao. Confirm the publisher’s latest guidance.","source_ids":["sr-f8103fb906a5fa5fdd8627835dfc2bf1"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 4.9.18 for contao/core-bundle. Confirm the publisher’s latest guidance.","source_ids":["sr-f8103fb906a5fa5fdd8627835dfc2bf1"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 4.11.7 for contao/core-bundle. Confirm the publisher’s latest guidance.","source_ids":["sr-f8103fb906a5fa5fdd8627835dfc2bf1"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-3c36d171b99f78f25d8c53a93d145d05"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.557%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.46494. Missing scores are unknown.","source_id":"sr-3c36d171b99f78f25d8c53a93d145d05"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-f8103fb906a5fa5fdd8627835dfc2bf1","url":"https://github.com/advisories/GHSA-hr3h-x6gq-rqcp","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-hr3h-x6gq-rqcp","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:42:20.432Z"},{"id":"sr-3c36d171b99f78f25d8c53a93d145d05","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2021-35955","publisher":"FIRST EPSS","observed_at":"2026-10-31T22:06:03.704Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-f8103fb906a5fa5fdd8627835dfc2bf1"],"technology":"contao/core-bundle","known_exclusions":[],"conditions_summary":"### Impact\n\nIt is possible for untrusted users to inject malicious code into HTML attributes in the back end, which will be executed both in the element preview (back end) and on the website (front end).\n\nInstallations are only affected if there are untrusted back end users who have the rights to modify HTML fields (e.g. TinyMCE).\n\n### Patches\n\nUpdate to Contao 4.4.56, 4.9.18 or 4.11.7\n\n### Workarounds\n\nDisable all fields that allow HTML for untrusted back end users or disable the login for these users.\n\n### References\n\nhttps://contao.org/en/security-advisories/cross-site-scripting-via-html-attributes-in-the-back-end\n\n### For more information\n\nIf you have any questions or comments about this advisory, open an issue in contao/contao.\n\n### Credits\n\nThanks to Mikhail Khramenkov and Moritz Vondano for reporting this security issue.","public_affected_ranges":["ECOSYSTEM: introduced 4.0.0; fixed 4.4.56"]},{"certainty":"source_listed","source_ids":["sr-f8103fb906a5fa5fdd8627835dfc2bf1"],"technology":"contao/contao","known_exclusions":[],"conditions_summary":"### Impact\n\nIt is possible for untrusted users to inject malicious code into HTML attributes in the back end, which will be executed both in the element preview (back end) and on the website (front end).\n\nInstallations are only affected if there are untrusted back end users who have the rights to modify HTML fields (e.g. TinyMCE).\n\n### Patches\n\nUpdate to Contao 4.4.56, 4.9.18 or 4.11.7\n\n### Workarounds\n\nDisable all fields that allow HTML for untrusted back end users or disable the login for these users.\n\n### References\n\nhttps://contao.org/en/security-advisories/cross-site-scripting-via-html-attributes-in-the-back-end\n\n### For more information\n\nIf you have any questions or comments about this advisory, open an issue in contao/contao.\n\n### Credits\n\nThanks to Mikhail Khramenkov and Moritz Vondano for reporting this security issue.","public_affected_ranges":["ECOSYSTEM: introduced 4.0.0; fixed 4.4.56"]},{"certainty":"source_listed","source_ids":["sr-f8103fb906a5fa5fdd8627835dfc2bf1"],"technology":"contao/contao","known_exclusions":[],"conditions_summary":"### Impact\n\nIt is possible for untrusted users to inject malicious code into HTML attributes in the back end, which will be executed both in the element preview (back end) and on the website (front end).\n\nInstallations are only affected if there are untrusted back end users who have the rights to modify HTML fields (e.g. TinyMCE).\n\n### Patches\n\nUpdate to Contao 4.4.56, 4.9.18 or 4.11.7\n\n### Workarounds\n\nDisable all fields that allow HTML for untrusted back end users or disable the login for these users.\n\n### References\n\nhttps://contao.org/en/security-advisories/cross-site-scripting-via-html-attributes-in-the-back-end\n\n### For more information\n\nIf you have any questions or comments about this advisory, open an issue in contao/contao.\n\n### Credits\n\nThanks to Mikhail Khramenkov and Moritz Vondano for reporting this security issue.","public_affected_ranges":["ECOSYSTEM: introduced 4.5.0; fixed 4.9.18"]},{"certainty":"source_listed","source_ids":["sr-f8103fb906a5fa5fdd8627835dfc2bf1"],"technology":"contao/contao","known_exclusions":[],"conditions_summary":"### Impact\n\nIt is possible for untrusted users to inject malicious code into HTML attributes in the back end, which will be executed both in the element preview (back end) and on the website (front end).\n\nInstallations are only affected if there are untrusted back end users who have the rights to modify HTML fields (e.g. TinyMCE).\n\n### Patches\n\nUpdate to Contao 4.4.56, 4.9.18 or 4.11.7\n\n### Workarounds\n\nDisable all fields that allow HTML for untrusted back end users or disable the login for these users.\n\n### References\n\nhttps://contao.org/en/security-advisories/cross-site-scripting-via-html-attributes-in-the-back-end\n\n### For more information\n\nIf you have any questions or comments about this advisory, open an issue in contao/contao.\n\n### Credits\n\nThanks to Mikhail Khramenkov and Moritz Vondano for reporting this security issue.","public_affected_ranges":["ECOSYSTEM: introduced 4.10.0; fixed 4.11.7"]},{"certainty":"source_listed","source_ids":["sr-f8103fb906a5fa5fdd8627835dfc2bf1"],"technology":"contao/core-bundle","known_exclusions":[],"conditions_summary":"### Impact\n\nIt is possible for untrusted users to inject malicious code into HTML attributes in the back end, which will be executed both in the element preview (back end) and on the website (front end).\n\nInstallations are only affected if there are untrusted back end users who have the rights to modify HTML fields (e.g. TinyMCE).\n\n### Patches\n\nUpdate to Contao 4.4.56, 4.9.18 or 4.11.7\n\n### Workarounds\n\nDisable all fields that allow HTML for untrusted back end users or disable the login for these users.\n\n### References\n\nhttps://contao.org/en/security-advisories/cross-site-scripting-via-html-attributes-in-the-back-end\n\n### For more information\n\nIf you have any questions or comments about this advisory, open an issue in contao/contao.\n\n### Credits\n\nThanks to Mikhail Khramenkov and Moritz Vondano for reporting this security issue.","public_affected_ranges":["ECOSYSTEM: introduced 4.5.0; fixed 4.9.18"]},{"certainty":"source_listed","source_ids":["sr-f8103fb906a5fa5fdd8627835dfc2bf1"],"technology":"contao/core-bundle","known_exclusions":[],"conditions_summary":"### Impact\n\nIt is possible for untrusted users to inject malicious code into HTML attributes in the back end, which will be executed both in the element preview (back end) and on the website (front end).\n\nInstallations are only affected if there are untrusted back end users who have the rights to modify HTML fields (e.g. TinyMCE).\n\n### Patches\n\nUpdate to Contao 4.4.56, 4.9.18 or 4.11.7\n\n### Workarounds\n\nDisable all fields that allow HTML for untrusted back end users or disable the login for these users.\n\n### References\n\nhttps://contao.org/en/security-advisories/cross-site-scripting-via-html-attributes-in-the-back-end\n\n### For more information\n\nIf you have any questions or comments about this advisory, open an issue in contao/contao.\n\n### Credits\n\nThanks to Mikhail Khramenkov and Moritz Vondano for reporting this security issue.","public_affected_ranges":["ECOSYSTEM: introduced 4.10.0; fixed 4.11.7"]}],"null_published_at":"2026-10-31T22:27:15.298Z","source_updated_at":"2026-07-08T06:28:14.331Z","source_disclosed_at":"2021-08-25T14:45:01.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.","null_first_observed_at":"2026-10-31T21:42:20.432Z"},{"id":"NVI-00008149","kind":"vulnerability","title":"Cross site scripting via HTML attributes in the back end","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-hr3h-x6gq-rqcp","CVE-2021-35955"],"plain_summary":"OSV carries this publisher advisory for contao/core-bundle, contao/contao, contao/contao, contao/contao, contao/core-bundle. This is an aggregated source copy; consult the original publisher and compare update dates.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"The original advisory lists fixed boundaries 4.4.56 for contao/core-bundle. Confirm the publisher’s latest guidance.","source_ids":["sr-f8103fb906a5fa5fdd8627835dfc2bf1"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 4.4.56 for contao/contao. Confirm the publisher’s latest guidance.","source_ids":["sr-f8103fb906a5fa5fdd8627835dfc2bf1"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 4.9.18 for contao/contao. Confirm the publisher’s latest guidance.","source_ids":["sr-f8103fb906a5fa5fdd8627835dfc2bf1"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 4.11.7 for contao/contao. Confirm the publisher’s latest guidance.","source_ids":["sr-f8103fb906a5fa5fdd8627835dfc2bf1"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 4.9.18 for contao/core-bundle. Confirm the publisher’s latest guidance.","source_ids":["sr-f8103fb906a5fa5fdd8627835dfc2bf1"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 4.11.7 for contao/core-bundle. Confirm the publisher’s latest guidance.","source_ids":["sr-f8103fb906a5fa5fdd8627835dfc2bf1"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-f8103fb906a5fa5fdd8627835dfc2bf1","url":"https://github.com/advisories/GHSA-hr3h-x6gq-rqcp","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-hr3h-x6gq-rqcp","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:42:20.432Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-f8103fb906a5fa5fdd8627835dfc2bf1"],"technology":"contao/core-bundle","known_exclusions":[],"conditions_summary":"### Impact\n\nIt is possible for untrusted users to inject malicious code into HTML attributes in the back end, which will be executed both in the element preview (back end) and on the website (front end).\n\nInstallations are only affected if there are untrusted back end users who have the rights to modify HTML fields (e.g. TinyMCE).\n\n### Patches\n\nUpdate to Contao 4.4.56, 4.9.18 or 4.11.7\n\n### Workarounds\n\nDisable all fields that allow HTML for untrusted back end users or disable the login for these users.\n\n### References\n\nhttps://contao.org/en/security-advisories/cross-site-scripting-via-html-attributes-in-the-back-end\n\n### For more information\n\nIf you have any questions or comments about this advisory, open an issue in contao/contao.\n\n### Credits\n\nThanks to Mikhail Khramenkov and Moritz Vondano for reporting this security issue.","public_affected_ranges":["ECOSYSTEM: introduced 4.0.0; fixed 4.4.56"]},{"certainty":"source_listed","source_ids":["sr-f8103fb906a5fa5fdd8627835dfc2bf1"],"technology":"contao/contao","known_exclusions":[],"conditions_summary":"### Impact\n\nIt is possible for untrusted users to inject malicious code into HTML attributes in the back end, which will be executed both in the element preview (back end) and on the website (front end).\n\nInstallations are only affected if there are untrusted back end users who have the rights to modify HTML fields (e.g. TinyMCE).\n\n### Patches\n\nUpdate to Contao 4.4.56, 4.9.18 or 4.11.7\n\n### Workarounds\n\nDisable all fields that allow HTML for untrusted back end users or disable the login for these users.\n\n### References\n\nhttps://contao.org/en/security-advisories/cross-site-scripting-via-html-attributes-in-the-back-end\n\n### For more information\n\nIf you have any questions or comments about this advisory, open an issue in contao/contao.\n\n### Credits\n\nThanks to Mikhail Khramenkov and Moritz Vondano for reporting this security issue.","public_affected_ranges":["ECOSYSTEM: introduced 4.0.0; fixed 4.4.56"]},{"certainty":"source_listed","source_ids":["sr-f8103fb906a5fa5fdd8627835dfc2bf1"],"technology":"contao/contao","known_exclusions":[],"conditions_summary":"### Impact\n\nIt is possible for untrusted users to inject malicious code into HTML attributes in the back end, which will be executed both in the element preview (back end) and on the website (front end).\n\nInstallations are only affected if there are untrusted back end users who have the rights to modify HTML fields (e.g. TinyMCE).\n\n### Patches\n\nUpdate to Contao 4.4.56, 4.9.18 or 4.11.7\n\n### Workarounds\n\nDisable all fields that allow HTML for untrusted back end users or disable the login for these users.\n\n### References\n\nhttps://contao.org/en/security-advisories/cross-site-scripting-via-html-attributes-in-the-back-end\n\n### For more information\n\nIf you have any questions or comments about this advisory, open an issue in contao/contao.\n\n### Credits\n\nThanks to Mikhail Khramenkov and Moritz Vondano for reporting this security issue.","public_affected_ranges":["ECOSYSTEM: introduced 4.5.0; fixed 4.9.18"]},{"certainty":"source_listed","source_ids":["sr-f8103fb906a5fa5fdd8627835dfc2bf1"],"technology":"contao/contao","known_exclusions":[],"conditions_summary":"### Impact\n\nIt is possible for untrusted users to inject malicious code into HTML attributes in the back end, which will be executed both in the element preview (back end) and on the website (front end).\n\nInstallations are only affected if there are untrusted back end users who have the rights to modify HTML fields (e.g. TinyMCE).\n\n### Patches\n\nUpdate to Contao 4.4.56, 4.9.18 or 4.11.7\n\n### Workarounds\n\nDisable all fields that allow HTML for untrusted back end users or disable the login for these users.\n\n### References\n\nhttps://contao.org/en/security-advisories/cross-site-scripting-via-html-attributes-in-the-back-end\n\n### For more information\n\nIf you have any questions or comments about this advisory, open an issue in contao/contao.\n\n### Credits\n\nThanks to Mikhail Khramenkov and Moritz Vondano for reporting this security issue.","public_affected_ranges":["ECOSYSTEM: introduced 4.10.0; fixed 4.11.7"]},{"certainty":"source_listed","source_ids":["sr-f8103fb906a5fa5fdd8627835dfc2bf1"],"technology":"contao/core-bundle","known_exclusions":[],"conditions_summary":"### Impact\n\nIt is possible for untrusted users to inject malicious code into HTML attributes in the back end, which will be executed both in the element preview (back end) and on the website (front end).\n\nInstallations are only affected if there are untrusted back end users who have the rights to modify HTML fields (e.g. TinyMCE).\n\n### Patches\n\nUpdate to Contao 4.4.56, 4.9.18 or 4.11.7\n\n### Workarounds\n\nDisable all fields that allow HTML for untrusted back end users or disable the login for these users.\n\n### References\n\nhttps://contao.org/en/security-advisories/cross-site-scripting-via-html-attributes-in-the-back-end\n\n### For more information\n\nIf you have any questions or comments about this advisory, open an issue in contao/contao.\n\n### Credits\n\nThanks to Mikhail Khramenkov and Moritz Vondano for reporting this security issue.","public_affected_ranges":["ECOSYSTEM: introduced 4.5.0; fixed 4.9.18"]},{"certainty":"source_listed","source_ids":["sr-f8103fb906a5fa5fdd8627835dfc2bf1"],"technology":"contao/core-bundle","known_exclusions":[],"conditions_summary":"### Impact\n\nIt is possible for untrusted users to inject malicious code into HTML attributes in the back end, which will be executed both in the element preview (back end) and on the website (front end).\n\nInstallations are only affected if there are untrusted back end users who have the rights to modify HTML fields (e.g. TinyMCE).\n\n### Patches\n\nUpdate to Contao 4.4.56, 4.9.18 or 4.11.7\n\n### Workarounds\n\nDisable all fields that allow HTML for untrusted back end users or disable the login for these users.\n\n### References\n\nhttps://contao.org/en/security-advisories/cross-site-scripting-via-html-attributes-in-the-back-end\n\n### For more information\n\nIf you have any questions or comments about this advisory, open an issue in contao/contao.\n\n### Credits\n\nThanks to Mikhail Khramenkov and Moritz Vondano for reporting this security issue.","public_affected_ranges":["ECOSYSTEM: introduced 4.10.0; fixed 4.11.7"]}],"null_published_at":"2026-10-31T22:13:22.831Z","source_updated_at":"2026-07-08T06:28:14.331Z","source_disclosed_at":"2021-08-25T14:45:01.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-10-31T21:42:20.432Z"}],"next_cursor":null,"snapshot_revision":"42594"}