CVE-2025-61676
published 2026-01-10CVE-2025-61676: 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…
PriorityP422medium4.8CVSS 3.1
AVNACLPRHUIRSCCLILAN
EPSS
0.18%
8.1th percentile
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 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.
Affected
5 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| october | system | >= 0 < 3.7.13 | 3.7.13 |
| october | system | >= 4.0.0 < 4.0.12 | 4.0.12 |
| octobercms | october | < 3.7.13 | 3.7.13 |
| octobercms | october | — | — |
| octobercms | october | >= 4.0.0 < 4.0.12 | 4.0.12 |
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GHSA
October CMS Vulnerable to Stored XSS via Branding Styles
ghsa·2026-01-09
CVE-2025-61676 [MEDIUM] CWE-79 October CMS Vulnerable to Stored XSS via Branding Styles
October CMS Vulnerable to Stored XSS via Branding Styles
A cross-site scripting (XSS) vulnerabilities was identified in October CMS backend configuration forms:
- **Branding and Appearances Styles**
A user with the `Customize Backend Styles` permission could inject malicious HTML/JS into the stylesheet input at
*Settings → Branding & Appearance → Styles*.
A specially crafted input could break out of the intended `` context, allowing arbitrary script execution across backend pages for all users.
---
### Impact
- Persistent XSS across the backend interface.
- Exploitable by lower-privileged accounts with the above permissions.
- Potential consequences include privilege escalation, session hijacking, and execution of unauthorized actions in victim sessions.
---
### Patches
The vulnerab
OSV
October CMS Vulnerable to Stored XSS via Branding Styles
osv·2026-01-09
CVE-2025-61676 [MEDIUM] October CMS Vulnerable to Stored XSS via Branding Styles
October CMS Vulnerable to Stored XSS via Branding Styles
A cross-site scripting (XSS) vulnerabilities was identified in October CMS backend configuration forms:
- **Branding and Appearances Styles**
A user with the `Customize Backend Styles` permission could inject malicious HTML/JS into the stylesheet input at
*Settings → Branding & Appearance → Styles*.
A specially crafted input could break out of the intended `` context, allowing arbitrary script execution across backend pages for all users.
---
### Impact
- Persistent XSS across the backend interface.
- Exploitable by lower-privileged accounts with the above permissions.
- Potential consequences include privilege escalation, session hijacking, and execution of unauthorized actions in victim sessions.
---
### Patches
The vulnerab
No detection rules found.
No public exploits indexed.
2026-01-10
Published