XSS in Octobercms October
CVE-2025-61674
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) vulnerability was identified in October CMS backend configuration forms. A user with the Global Editor Settings permission could inject malicious HTML/JS into the stylesheet input at Markup Styles. 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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.003 (18.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 18th percentile — 18.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000
Affected products
- Octobercms October — versions >= 4.0.0, < 4.0.12, < 3.7.13
Weakness classification (CWE)
References
- github.com/octobercms/october/security/advisories/GHSA-gxxc-m74c-f48x (Patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2025-61674?
- CVE-2025-61674 is a medium-severity vulnerability in Octobercms October, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-01-10.
- How severe is CVE-2025-61674?
- Medium severity. CVSS v3 base score is 6.1 out of 10.