{"items":[{"id":"NVI-00008226","kind":"vulnerability","title":"Cross-site scripting vulnerability in TinyMCE","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-5h9g-x5rv-25wg","CVE-2024-21908"],"plain_summary":"OSV carries this publisher advisory for tinymce, TinyMCE, tinymce/tinymce. 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 5.9.0 for tinymce. Confirm the publisher’s latest guidance.","source_ids":["sr-faef09ab90d536a60c05a9bb60167f4b"],"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 5.9.0 for tinymce/tinymce. Confirm the publisher’s latest guidance.","source_ids":["sr-faef09ab90d536a60c05a9bb60167f4b"],"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-b04a207332e952b927fe0c12697f76ad"],"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":"1.066%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.6476. Missing scores are unknown.","source_id":"sr-b04a207332e952b927fe0c12697f76ad"}],"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-faef09ab90d536a60c05a9bb60167f4b","url":"https://github.com/advisories/GHSA-5h9g-x5rv-25wg","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-5h9g-x5rv-25wg","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:41:59.922Z"},{"id":"sr-b04a207332e952b927fe0c12697f76ad","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-2024-21908","publisher":"FIRST EPSS","observed_at":"2026-10-31T22:06:03.704Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-faef09ab90d536a60c05a9bb60167f4b"],"technology":"tinymce","known_exclusions":[],"conditions_summary":"### Impact\nA cross-site scripting (XSS) vulnerability was discovered in the schema validation logic of the core parser. The vulnerability allowed arbitrary JavaScript execution when inserting a specially crafted piece of content into the editor using the clipboard or editor APIs. This malicious content could then end up in content published outside the editor, if no server-side sanitization was performed. This impacts all users who are using TinyMCE 5.8.2 or lower.\n\n### Patches\nThis vulnerability has been patched in TinyMCE 5.9.0 by ensuring schema validation was still performed after unwrapping invalid elements.\n\n### Workarounds\nTo work around this vulnerability, either:\n- Upgrade to TinyMCE 5.9.0 or higher\n- Manually sanitize the content using the `BeforeSetContent` event (see below)\n\n#### Example: Manually sanitize content\n```js\neditor.on('BeforeSetContent', function(e) {\n  var sanitizedContent = ...; // Manually sanitize content here\n  e.content = sanitizedContent;\n});\n```\n\n### Acknowledgements\nTiny Technologies would like to thank William Bowling for discovering this vulnerability.\n\n### References\nhttps://www.tiny.cloud/docs/release-notes/release-notes59/#securityfixes\n\n### Fo","public_affected_ranges":["SEMVER: introduced 0; fixed 5.9.0"]},{"certainty":"source_listed","source_ids":["sr-faef09ab90d536a60c05a9bb60167f4b"],"technology":"TinyMCE","known_exclusions":[],"conditions_summary":"### Impact\nA cross-site scripting (XSS) vulnerability was discovered in the schema validation logic of the core parser. The vulnerability allowed arbitrary JavaScript execution when inserting a specially crafted piece of content into the editor using the clipboard or editor APIs. This malicious content could then end up in content published outside the editor, if no server-side sanitization was performed. This impacts all users who are using TinyMCE 5.8.2 or lower.\n\n### Patches\nThis vulnerability has been patched in TinyMCE 5.9.0 by ensuring schema validation was still performed after unwrapping invalid elements.\n\n### Workarounds\nTo work around this vulnerability, either:\n- Upgrade to TinyMCE 5.9.0 or higher\n- Manually sanitize the content using the `BeforeSetContent` event (see below)\n\n#### Example: Manually sanitize content\n```js\neditor.on('BeforeSetContent', function(e) {\n  var sanitizedContent = ...; // Manually sanitize content here\n  e.content = sanitizedContent;\n});\n```\n\n### Acknowledgements\nTiny Technologies would like to thank William Bowling for discovering this vulnerability.\n\n### References\nhttps://www.tiny.cloud/docs/release-notes/release-notes59/#securityfixes\n\n### Fo","public_affected_ranges":["ECOSYSTEM: introduced 0; fixed 5.9.0"]},{"certainty":"source_listed","source_ids":["sr-faef09ab90d536a60c05a9bb60167f4b"],"technology":"tinymce/tinymce","known_exclusions":[],"conditions_summary":"### Impact\nA cross-site scripting (XSS) vulnerability was discovered in the schema validation logic of the core parser. The vulnerability allowed arbitrary JavaScript execution when inserting a specially crafted piece of content into the editor using the clipboard or editor APIs. This malicious content could then end up in content published outside the editor, if no server-side sanitization was performed. This impacts all users who are using TinyMCE 5.8.2 or lower.\n\n### Patches\nThis vulnerability has been patched in TinyMCE 5.9.0 by ensuring schema validation was still performed after unwrapping invalid elements.\n\n### Workarounds\nTo work around this vulnerability, either:\n- Upgrade to TinyMCE 5.9.0 or higher\n- Manually sanitize the content using the `BeforeSetContent` event (see below)\n\n#### Example: Manually sanitize content\n```js\neditor.on('BeforeSetContent', function(e) {\n  var sanitizedContent = ...; // Manually sanitize content here\n  e.content = sanitizedContent;\n});\n```\n\n### Acknowledgements\nTiny Technologies would like to thank William Bowling for discovering this vulnerability.\n\n### References\nhttps://www.tiny.cloud/docs/release-notes/release-notes59/#securityfixes\n\n### Fo","public_affected_ranges":["ECOSYSTEM: introduced 0; fixed 5.9.0"]}],"null_published_at":"2026-11-05T03:52:54.774Z","source_updated_at":"2026-07-08T06:52:56.328Z","source_disclosed_at":"2021-10-22T16:24:02.000Z","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":"2026-10-31T21:41:59.922Z"},{"id":"NVI-00008226","kind":"vulnerability","title":"Cross-site scripting vulnerability in TinyMCE","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-5h9g-x5rv-25wg","CVE-2024-21908"],"plain_summary":"OSV carries this publisher advisory for tinymce, TinyMCE, tinymce/tinymce. 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 5.9.0 for tinymce. Confirm the publisher’s latest guidance.","source_ids":["sr-faef09ab90d536a60c05a9bb60167f4b"],"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 5.9.0 for tinymce/tinymce. Confirm the publisher’s latest guidance.","source_ids":["sr-faef09ab90d536a60c05a9bb60167f4b"],"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-faef09ab90d536a60c05a9bb60167f4b","url":"https://github.com/advisories/GHSA-5h9g-x5rv-25wg","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-5h9g-x5rv-25wg","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:41:59.922Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-faef09ab90d536a60c05a9bb60167f4b"],"technology":"tinymce","known_exclusions":[],"conditions_summary":"### Impact\nA cross-site scripting (XSS) vulnerability was discovered in the schema validation logic of the core parser. The vulnerability allowed arbitrary JavaScript execution when inserting a specially crafted piece of content into the editor using the clipboard or editor APIs. This malicious content could then end up in content published outside the editor, if no server-side sanitization was performed. This impacts all users who are using TinyMCE 5.8.2 or lower.\n\n### Patches\nThis vulnerability has been patched in TinyMCE 5.9.0 by ensuring schema validation was still performed after unwrapping invalid elements.\n\n### Workarounds\nTo work around this vulnerability, either:\n- Upgrade to TinyMCE 5.9.0 or higher\n- Manually sanitize the content using the `BeforeSetContent` event (see below)\n\n#### Example: Manually sanitize content\n```js\neditor.on('BeforeSetContent', function(e) {\n  var sanitizedContent = ...; // Manually sanitize content here\n  e.content = sanitizedContent;\n});\n```\n\n### Acknowledgements\nTiny Technologies would like to thank William Bowling for discovering this vulnerability.\n\n### References\nhttps://www.tiny.cloud/docs/release-notes/release-notes59/#securityfixes\n\n### Fo","public_affected_ranges":["SEMVER: introduced 0; fixed 5.9.0"]},{"certainty":"source_listed","source_ids":["sr-faef09ab90d536a60c05a9bb60167f4b"],"technology":"TinyMCE","known_exclusions":[],"conditions_summary":"### Impact\nA cross-site scripting (XSS) vulnerability was discovered in the schema validation logic of the core parser. The vulnerability allowed arbitrary JavaScript execution when inserting a specially crafted piece of content into the editor using the clipboard or editor APIs. This malicious content could then end up in content published outside the editor, if no server-side sanitization was performed. This impacts all users who are using TinyMCE 5.8.2 or lower.\n\n### Patches\nThis vulnerability has been patched in TinyMCE 5.9.0 by ensuring schema validation was still performed after unwrapping invalid elements.\n\n### Workarounds\nTo work around this vulnerability, either:\n- Upgrade to TinyMCE 5.9.0 or higher\n- Manually sanitize the content using the `BeforeSetContent` event (see below)\n\n#### Example: Manually sanitize content\n```js\neditor.on('BeforeSetContent', function(e) {\n  var sanitizedContent = ...; // Manually sanitize content here\n  e.content = sanitizedContent;\n});\n```\n\n### Acknowledgements\nTiny Technologies would like to thank William Bowling for discovering this vulnerability.\n\n### References\nhttps://www.tiny.cloud/docs/release-notes/release-notes59/#securityfixes\n\n### Fo","public_affected_ranges":["ECOSYSTEM: introduced 0; fixed 5.9.0"]},{"certainty":"source_listed","source_ids":["sr-faef09ab90d536a60c05a9bb60167f4b"],"technology":"tinymce/tinymce","known_exclusions":[],"conditions_summary":"### Impact\nA cross-site scripting (XSS) vulnerability was discovered in the schema validation logic of the core parser. The vulnerability allowed arbitrary JavaScript execution when inserting a specially crafted piece of content into the editor using the clipboard or editor APIs. This malicious content could then end up in content published outside the editor, if no server-side sanitization was performed. This impacts all users who are using TinyMCE 5.8.2 or lower.\n\n### Patches\nThis vulnerability has been patched in TinyMCE 5.9.0 by ensuring schema validation was still performed after unwrapping invalid elements.\n\n### Workarounds\nTo work around this vulnerability, either:\n- Upgrade to TinyMCE 5.9.0 or higher\n- Manually sanitize the content using the `BeforeSetContent` event (see below)\n\n#### Example: Manually sanitize content\n```js\neditor.on('BeforeSetContent', function(e) {\n  var sanitizedContent = ...; // Manually sanitize content here\n  e.content = sanitizedContent;\n});\n```\n\n### Acknowledgements\nTiny Technologies would like to thank William Bowling for discovering this vulnerability.\n\n### References\nhttps://www.tiny.cloud/docs/release-notes/release-notes59/#securityfixes\n\n### Fo","public_affected_ranges":["ECOSYSTEM: introduced 0; fixed 5.9.0"]}],"null_published_at":"2026-10-31T22:13:22.835Z","source_updated_at":"2026-07-08T06:52:56.328Z","source_disclosed_at":"2021-10-22T16:24:02.000Z","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":"2026-10-31T21:41:59.922Z"}],"next_cursor":null,"snapshot_revision":"42594"}