GHSA-gcqv-f29m-67gr
October Rain has Stored XSS via SVG Filter Bypass
Quick fix
GHSA-gcqv-f29m-67gr — october/rain: upgrade to the fixed version with the command below.
composer require october/rain:^4.1.10Details
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.
### Impact - Stored XSS via malicious SVG files uploaded through the Media Manager - Could allow privilege escalation if a superuser views or embeds the malicious SVG - Requires authenticated backend access with media upload permissions (`media.library.create`) - SVG must be viewed or embedded in a page to trigger
### Patches The vulnerability has been patched in v3.7.14 and v4.1.10. All users are encouraged to upgrade to the latest patched version.
### Workarounds If upgrading immediately is not possible: - Disable SVG uploads by adding `svg` to the blocked extensions in media configuration - Set `media.clean_vectors` to `true` in configuration (enabled by default)
### References - Reported by Pentest-Tools.com
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