{"id":"GHSA-gcqv-f29m-67gr","summary":"October Rain has Stored XSS via SVG Filter Bypass","details":"A stored cross-site scripting (XSS) vulnerability was identified in the SVG sanitization logic. The regex pattern used to strip `on*` event handler attributes could be bypassed using a crafted payload that exploits how the pattern matches attribute boundaries.\n\n### Impact\n- Stored XSS via malicious SVG files uploaded through the Media Manager\n- Could allow privilege escalation if a superuser views or embeds the malicious SVG\n- Requires authenticated backend access with media upload permissions (`media.library.create`)\n- SVG must be viewed or embedded in a page to trigger\n\n### Patches\nThe vulnerability has been patched in v3.7.14 and v4.1.10. All users are encouraged to upgrade to the latest patched version.\n\n### Workarounds\nIf upgrading immediately is not possible:\n- Disable SVG uploads by adding `svg` to the blocked extensions in media configuration\n- Set `media.clean_vectors` to `true` in configuration (enabled by default)\n\n### References\n- Reported by Pentest-Tools.com","aliases":["CVE-2026-25133"],"modified":"2026-05-08T20:50:40.219223Z","published":"2026-04-14T22:29:50Z","database_specific":{"github_reviewed":true,"github_reviewed_at":"2026-04-14T22:29:50Z","nvd_published_at":"2026-04-14T21:16:25Z","cwe_ids":["CWE-79"],"severity":"MODERATE"},"references":[{"type":"WEB","url":"https://github.com/octobercms/october/security/advisories/GHSA-gcqv-f29m-67gr"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-25133"},{"type":"PACKAGE","url":"https://github.com/octobercms/october"}],"affected":[{"package":{"name":"october/rain","ecosystem":"Packagist","purl":"pkg:composer/october/rain"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.0.0"},{"fixed":"4.1.10"}]}],"versions":["v4.0.0","v4.0.1","v4.0.10","v4.0.11","v4.0.12","v4.0.13","v4.0.16","v4.0.2","v4.0.20","v4.0.22","v4.0.3","v4.0.6","v4.0.7","v4.1.0","v4.1.1","v4.1.4","v4.1.5","v4.1.6","v4.1.9"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-gcqv-f29m-67gr/GHSA-gcqv-f29m-67gr.json","last_known_affected_version_range":"\u003c= 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