{"items":[{"id":"NVI-00007001","kind":"vulnerability","title":"Flarum: Path traversal in LESS parser via theme color settings (incomplete fix for CVE-2023-27577)","revision":4,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected.","NVD lastModified does not establish freshness of every associated CPE record."],"lifecycle":"active","identifiers":["GHSA-xjvc-pw2r-6878","CVE-2026-41887"],"plain_summary":"OSV carries this publisher advisory for flarum/core, flarum/core. 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 1.8.16 for flarum/core. Confirm the publisher’s latest guidance.","source_ids":["sr-cae3140692f46a3bccfcf28a23b90bbd"],"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 2.0.0-rc.1 for flarum/core. Confirm the publisher’s latest guidance.","source_ids":["sr-cae3140692f46a3bccfcf28a23b90bbd"],"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-20b23ccb41ffe05dbad9dc3002e61c11"],"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":"CVSS","as_of":"2026-10-26T18:10:00.173Z","value":"4.9 MEDIUM (3.1)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-6fc4327a50c224bd3ed8e386eed114bf"},{"kind":"EPSS","as_of":"2026-11-02T12:00:30.000Z","value":"0.472%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.40789. Missing scores are unknown.","source_id":"sr-20b23ccb41ffe05dbad9dc3002e61c11"}],"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-cae3140692f46a3bccfcf28a23b90bbd","url":"https://github.com/advisories/GHSA-xjvc-pw2r-6878","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-xjvc-pw2r-6878","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:42:51.446Z"},{"id":"sr-6fc4327a50c224bd3ed8e386eed114bf","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-41887","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-41887","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-01T07:24:02.489Z"},{"id":"sr-20b23ccb41ffe05dbad9dc3002e61c11","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-2026-41887","publisher":"FIRST EPSS","observed_at":"2026-11-02T20:15:58.853Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-cae3140692f46a3bccfcf28a23b90bbd"],"technology":"flarum/core","known_exclusions":[],"conditions_summary":"## Summary\n\nFlarum's patch for CVE-2023-27577 restricted the `@import` and `data-uri()` LESS features in the `custom_less` setting, but the same restriction was never applied to other settings registered as LESS config variables (for example `theme_primary_color` and `theme_secondary_color`, as well as any key registered via `Extend\\Settings::registerLessConfigVar()`).\n\nThose values are interpolated verbatim into the LESS source at compile time, allowing an authenticated administrator to craft a theme-color value that injects an arbitrary `@import` directive into the compiled `forum.css`. Because the underlying LESS parser honours `@import (inline) ''`, an attacker can read arbitrary files reachable by the PHP process (local file inclusion) or trigger outbound HTTP(S) requests (server-side request forgery).\n\n## Impact\n\nAn attacker who has compromised — or legitimately obtained — an administrator account can:\n\n- **Read arbitrary local files** reachable by the PHP process (e.g. `/etc/passwd`, `.env`, config files containing database credentials, OAuth secrets, API keys).\n- **Trigger outbound HTTP/HTT","public_affected_ranges":["ECOSYSTEM: introduced 0; fixed 1.8.16"]},{"certainty":"source_listed","source_ids":["sr-cae3140692f46a3bccfcf28a23b90bbd"],"technology":"flarum/core","known_exclusions":[],"conditions_summary":"## Summary\n\nFlarum's patch for CVE-2023-27577 restricted the `@import` and `data-uri()` LESS features in the `custom_less` setting, but the same restriction was never applied to other settings registered as LESS config variables (for example `theme_primary_color` and `theme_secondary_color`, as well as any key registered via `Extend\\Settings::registerLessConfigVar()`).\n\nThose values are interpolated verbatim into the LESS source at compile time, allowing an authenticated administrator to craft a theme-color value that injects an arbitrary `@import` directive into the compiled `forum.css`. Because the underlying LESS parser honours `@import (inline) ''`, an attacker can read arbitrary files reachable by the PHP process (local file inclusion) or trigger outbound HTTP(S) requests (server-side request forgery).\n\n## Impact\n\nAn attacker who has compromised — or legitimately obtained — an administrator account can:\n\n- **Read arbitrary local files** reachable by the PHP process (e.g. `/etc/passwd`, `.env`, config files containing database credentials, OAuth secrets, API keys).\n- **Trigger outbound HTTP/HTT","public_affected_ranges":["ECOSYSTEM: introduced 2.0.0-beta.1; fixed 2.0.0-rc.1"]}],"null_published_at":"2026-11-07T14:01:58.735Z","source_updated_at":"2026-05-13T13:55:21.933Z","source_disclosed_at":"2026-04-22T20:34:52.000Z","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":"2026-10-31T21:42:51.446Z"},{"id":"NVI-00007001","kind":"vulnerability","title":"Flarum: Path traversal in LESS parser via theme color settings (incomplete fix for CVE-2023-27577)","revision":3,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected.","NVD lastModified does not establish freshness of every associated CPE record."],"lifecycle":"active","identifiers":["GHSA-xjvc-pw2r-6878","CVE-2026-41887"],"plain_summary":"OSV carries this publisher advisory for flarum/core, flarum/core. 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 1.8.16 for flarum/core. Confirm the publisher’s latest guidance.","source_ids":["sr-cae3140692f46a3bccfcf28a23b90bbd"],"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 2.0.0-rc.1 for flarum/core. Confirm the publisher’s latest guidance.","source_ids":["sr-cae3140692f46a3bccfcf28a23b90bbd"],"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-2b925b92fdda1ffa5d1ea9cc9d42849f"],"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":"CVSS","as_of":"2026-10-26T18:10:00.173Z","value":"4.9 MEDIUM (3.1)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-6fc4327a50c224bd3ed8e386eed114bf"},{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.472%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.4081. Missing scores are unknown.","source_id":"sr-2b925b92fdda1ffa5d1ea9cc9d42849f"}],"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-cae3140692f46a3bccfcf28a23b90bbd","url":"https://github.com/advisories/GHSA-xjvc-pw2r-6878","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-xjvc-pw2r-6878","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:42:51.446Z"},{"id":"sr-6fc4327a50c224bd3ed8e386eed114bf","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-41887","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-41887","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-01T07:24:02.489Z"},{"id":"sr-2b925b92fdda1ffa5d1ea9cc9d42849f","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-2026-41887","publisher":"FIRST EPSS","observed_at":"2026-10-31T22:06:15.378Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-cae3140692f46a3bccfcf28a23b90bbd"],"technology":"flarum/core","known_exclusions":[],"conditions_summary":"## Summary\n\nFlarum's patch for CVE-2023-27577 restricted the `@import` and `data-uri()` LESS features in the `custom_less` setting, but the same restriction was never applied to other settings registered as LESS config variables (for example `theme_primary_color` and `theme_secondary_color`, as well as any key registered via `Extend\\Settings::registerLessConfigVar()`).\n\nThose values are interpolated verbatim into the LESS source at compile time, allowing an authenticated administrator to craft a theme-color value that injects an arbitrary `@import` directive into the compiled `forum.css`. Because the underlying LESS parser honours `@import (inline) ''`, an attacker can read arbitrary files reachable by the PHP process (local file inclusion) or trigger outbound HTTP(S) requests (server-side request forgery).\n\n## Impact\n\nAn attacker who has compromised — or legitimately obtained — an administrator account can:\n\n- **Read arbitrary local files** reachable by the PHP process (e.g. `/etc/passwd`, `.env`, config files containing database credentials, OAuth secrets, API keys).\n- **Trigger outbound HTTP/HTT","public_affected_ranges":["ECOSYSTEM: introduced 0; fixed 1.8.16"]},{"certainty":"source_listed","source_ids":["sr-cae3140692f46a3bccfcf28a23b90bbd"],"technology":"flarum/core","known_exclusions":[],"conditions_summary":"## Summary\n\nFlarum's patch for CVE-2023-27577 restricted the `@import` and `data-uri()` LESS features in the `custom_less` setting, but the same restriction was never applied to other settings registered as LESS config variables (for example `theme_primary_color` and `theme_secondary_color`, as well as any key registered via `Extend\\Settings::registerLessConfigVar()`).\n\nThose values are interpolated verbatim into the LESS source at compile time, allowing an authenticated administrator to craft a theme-color value that injects an arbitrary `@import` directive into the compiled `forum.css`. Because the underlying LESS parser honours `@import (inline) ''`, an attacker can read arbitrary files reachable by the PHP process (local file inclusion) or trigger outbound HTTP(S) requests (server-side request forgery).\n\n## Impact\n\nAn attacker who has compromised — or legitimately obtained — an administrator account can:\n\n- **Read arbitrary local files** reachable by the PHP process (e.g. `/etc/passwd`, `.env`, config files containing database credentials, OAuth secrets, API keys).\n- **Trigger outbound HTTP/HTT","public_affected_ranges":["ECOSYSTEM: introduced 2.0.0-beta.1; fixed 2.0.0-rc.1"]}],"null_published_at":"2026-11-02T20:21:10.324Z","source_updated_at":"2026-05-13T13:55:21.933Z","source_disclosed_at":"2026-04-22T20:34:52.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-10-31T21:42:51.446Z"},{"id":"NVI-00007001","kind":"vulnerability","title":"Flarum: Path traversal in LESS parser via theme color settings (incomplete fix for CVE-2023-27577)","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-xjvc-pw2r-6878","CVE-2026-41887"],"plain_summary":"OSV carries this publisher advisory for flarum/core, flarum/core. 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 1.8.16 for flarum/core. Confirm the publisher’s latest guidance.","source_ids":["sr-cae3140692f46a3bccfcf28a23b90bbd"],"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 2.0.0-rc.1 for flarum/core. Confirm the publisher’s latest guidance.","source_ids":["sr-cae3140692f46a3bccfcf28a23b90bbd"],"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-2b925b92fdda1ffa5d1ea9cc9d42849f"],"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":"0.472%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.4081. Missing scores are unknown.","source_id":"sr-2b925b92fdda1ffa5d1ea9cc9d42849f"}],"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-cae3140692f46a3bccfcf28a23b90bbd","url":"https://github.com/advisories/GHSA-xjvc-pw2r-6878","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-xjvc-pw2r-6878","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:42:51.446Z"},{"id":"sr-2b925b92fdda1ffa5d1ea9cc9d42849f","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-2026-41887","publisher":"FIRST EPSS","observed_at":"2026-10-31T22:06:15.378Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-cae3140692f46a3bccfcf28a23b90bbd"],"technology":"flarum/core","known_exclusions":[],"conditions_summary":"## Summary\n\nFlarum's patch for CVE-2023-27577 restricted the `@import` and `data-uri()` LESS features in the `custom_less` setting, but the same restriction was never applied to other settings registered as LESS config variables (for example `theme_primary_color` and `theme_secondary_color`, as well as any key registered via `Extend\\Settings::registerLessConfigVar()`).\n\nThose values are interpolated verbatim into the LESS source at compile time, allowing an authenticated administrator to craft a theme-color value that injects an arbitrary `@import` directive into the compiled `forum.css`. Because the underlying LESS parser honours `@import (inline) ''`, an attacker can read arbitrary files reachable by the PHP process (local file inclusion) or trigger outbound HTTP(S) requests (server-side request forgery).\n\n## Impact\n\nAn attacker who has compromised — or legitimately obtained — an administrator account can:\n\n- **Read arbitrary local files** reachable by the PHP process (e.g. `/etc/passwd`, `.env`, config files containing database credentials, OAuth secrets, API keys).\n- **Trigger outbound HTTP/HTT","public_affected_ranges":["ECOSYSTEM: introduced 0; fixed 1.8.16"]},{"certainty":"source_listed","source_ids":["sr-cae3140692f46a3bccfcf28a23b90bbd"],"technology":"flarum/core","known_exclusions":[],"conditions_summary":"## Summary\n\nFlarum's patch for CVE-2023-27577 restricted the `@import` and `data-uri()` LESS features in the `custom_less` setting, but the same restriction was never applied to other settings registered as LESS config variables (for example `theme_primary_color` and `theme_secondary_color`, as well as any key registered via `Extend\\Settings::registerLessConfigVar()`).\n\nThose values are interpolated verbatim into the LESS source at compile time, allowing an authenticated administrator to craft a theme-color value that injects an arbitrary `@import` directive into the compiled `forum.css`. Because the underlying LESS parser honours `@import (inline) ''`, an attacker can read arbitrary files reachable by the PHP process (local file inclusion) or trigger outbound HTTP(S) requests (server-side request forgery).\n\n## Impact\n\nAn attacker who has compromised — or legitimately obtained — an administrator account can:\n\n- **Read arbitrary local files** reachable by the PHP process (e.g. `/etc/passwd`, `.env`, config files containing database credentials, OAuth secrets, API keys).\n- **Trigger outbound HTTP/HTT","public_affected_ranges":["ECOSYSTEM: introduced 2.0.0-beta.1; fixed 2.0.0-rc.1"]}],"null_published_at":"2026-10-31T22:27:15.268Z","source_updated_at":"2026-05-13T13:55:21.933Z","source_disclosed_at":"2026-04-22T20:34:52.000Z","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":"2026-10-31T21:42:51.446Z"},{"id":"NVI-00007001","kind":"vulnerability","title":"Flarum: Path traversal in LESS parser via theme color settings (incomplete fix for CVE-2023-27577)","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-xjvc-pw2r-6878","CVE-2026-41887"],"plain_summary":"OSV carries this publisher advisory for flarum/core, flarum/core. 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 1.8.16 for flarum/core. Confirm the publisher’s latest guidance.","source_ids":["sr-cae3140692f46a3bccfcf28a23b90bbd"],"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 2.0.0-rc.1 for flarum/core. Confirm the publisher’s latest guidance.","source_ids":["sr-cae3140692f46a3bccfcf28a23b90bbd"],"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-cae3140692f46a3bccfcf28a23b90bbd","url":"https://github.com/advisories/GHSA-xjvc-pw2r-6878","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-xjvc-pw2r-6878","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:42:51.446Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-cae3140692f46a3bccfcf28a23b90bbd"],"technology":"flarum/core","known_exclusions":[],"conditions_summary":"## Summary\n\nFlarum's patch for CVE-2023-27577 restricted the `@import` and `data-uri()` LESS features in the `custom_less` setting, but the same restriction was never applied to other settings registered as LESS config variables (for example `theme_primary_color` and `theme_secondary_color`, as well as any key registered via `Extend\\Settings::registerLessConfigVar()`).\n\nThose values are interpolated verbatim into the LESS source at compile time, allowing an authenticated administrator to craft a theme-color value that injects an arbitrary `@import` directive into the compiled `forum.css`. Because the underlying LESS parser honours `@import (inline) ''`, an attacker can read arbitrary files reachable by the PHP process (local file inclusion) or trigger outbound HTTP(S) requests (server-side request forgery).\n\n## Impact\n\nAn attacker who has compromised — or legitimately obtained — an administrator account can:\n\n- **Read arbitrary local files** reachable by the PHP process (e.g. `/etc/passwd`, `.env`, config files containing database credentials, OAuth secrets, API keys).\n- **Trigger outbound HTTP/HTT","public_affected_ranges":["ECOSYSTEM: introduced 0; fixed 1.8.16"]},{"certainty":"source_listed","source_ids":["sr-cae3140692f46a3bccfcf28a23b90bbd"],"technology":"flarum/core","known_exclusions":[],"conditions_summary":"## Summary\n\nFlarum's patch for CVE-2023-27577 restricted the `@import` and `data-uri()` LESS features in the `custom_less` setting, but the same restriction was never applied to other settings registered as LESS config variables (for example `theme_primary_color` and `theme_secondary_color`, as well as any key registered via `Extend\\Settings::registerLessConfigVar()`).\n\nThose values are interpolated verbatim into the LESS source at compile time, allowing an authenticated administrator to craft a theme-color value that injects an arbitrary `@import` directive into the compiled `forum.css`. Because the underlying LESS parser honours `@import (inline) ''`, an attacker can read arbitrary files reachable by the PHP process (local file inclusion) or trigger outbound HTTP(S) requests (server-side request forgery).\n\n## Impact\n\nAn attacker who has compromised — or legitimately obtained — an administrator account can:\n\n- **Read arbitrary local files** reachable by the PHP process (e.g. `/etc/passwd`, `.env`, config files containing database credentials, OAuth secrets, API keys).\n- **Trigger outbound HTTP/HTT","public_affected_ranges":["ECOSYSTEM: introduced 2.0.0-beta.1; fixed 2.0.0-rc.1"]}],"null_published_at":"2026-10-31T22:13:14.307Z","source_updated_at":"2026-05-13T13:55:21.933Z","source_disclosed_at":"2026-04-22T20:34:52.000Z","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":"2026-10-31T21:42:51.446Z"}],"next_cursor":null,"snapshot_revision":"42594"}