{"id":"CVE-2025-61676","aliases":["GHSA-wvpq-h33f-8rp6"],"url":"https://o3.security/vulnerability/CVE-2025-61676","summary":"October CMS Vulnerable to Stored XSS via Branding Styles","details":"October is a Content Management System (CMS) and web platform. Prior to versions 3.7.13 and 4.0.12, a cross-site scripting (XSS) vulnerabilities was identified in October CMS backend configuration forms. A user with the Customize Backend Styles permission could inject malicious HTML/JS into the stylesheet input at Styles from Branding & Appearance settings. A specially crafted input could break out of the intended <style> context, allowing arbitrary script execution across backend pages for all users. This issue has been patched in versions 3.7.13 and 4.0.12.","published":"2026-01-10T03:14:00.708Z","modified":"2026-08-08T03:47:42.604673397Z","cvss":{"score":6.1,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"october/system","fixedVersion":"3.7.13"},{"ecosystem":"Packagist","name":"october/system","fixedVersion":"4.0.12"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/61xxx/CVE-2025-61676.json"},{"type":"ADVISORY","url":"https://github.com/octobercms/october/security/advisories/GHSA-wvpq-h33f-8rp6"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-61676"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-08T03:47:42.604673397Z"}}