CVE-2026-25133
Description
October is a Content Management System (CMS) and web platform. Versions prior to 3.7.14 and 4.1.10 contain a stored cross-site scripting (XSS) vulnerability in the SVG sanitization logic. The regex pattern used to strip event handler attributes (such as onclick or onload) could be bypassed using a crafted payload that exploits how the pattern matches attribute boundaries, allowing malicious SVG files to be uploaded through the Media Manager with embedded JavaScript. Exploitation could lead to privilege escalation if a superuser views or embeds the malicious SVG, and requires authenticated backend access with media upload permissions. The SVG must be viewed or embedded in a page for the payload to trigger. This issue has been fixed in versions 3.7.14 and 4.1.10.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
october/rainPackagist | >= 4.0.0, < 4.1.10 | 4.1.10 |
october/rainPackagist | < 3.7.14 | 3.7.14 |
Affected products
2Patches
Vulnerability mechanics
References
3- github.com/advisories/GHSA-gcqv-f29m-67grghsaADVISORY
- github.com/octobercms/october/security/advisories/GHSA-gcqv-f29m-67grnvdVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2026-25133ghsaADVISORY
News mentions
0No linked articles in our index yet.