Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.6.37, a Stored XSS vulnerability was discovered in Open-WebUI's Notes PDF download functionality. An attacker can import a Markdown file containing malicious SVG tags into Notes, allowing them to execute arbitrary JavaScript code and steal session tokens when a victim downloads the note as PDF. This vulnerability can be exploited by any authenticated user, and unauthenticated external attackers can steal session tokens from users (both admin and regular users) by sharing specially crafted markdown files. This vulnerability is fixed in 0.6.37.
Fix
Patch, vendor advisory and mitigation references on NVD 3
- https://github.com/open-webui/open-webui/commit/03cc6ce8eb5c055115406e2304fbf7e3338b8dce Patch
- https://github.com/open-webui/open-webui/security/advisories/GHSA-8wvc-869r-xfqf Exploit, Vendor Advisory
- https://github.com/open-webui/open-webui/security/advisories/GHSA-8wvc-869r-xfqf Exploit, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 5.4 · openwebuiNVD modified 2026-10-18 15:10
Affected (CPE criteria) 1
cpe:2.3:a:openwebui:open_webui:*:*:*:*:*:*:*:*
References 3
- https://github.com/open-webui/open-webui/commit/03cc6ce8eb5c055115406e2304fbf7e3338b8dce Patch
- https://github.com/open-webui/open-webui/security/advisories/GHSA-8wvc-869r-xfqf Exploit, Vendor Advisory
- https://github.com/open-webui/open-webui/security/advisories/GHSA-8wvc-869r-xfqf Exploit, Vendor Advisory