Stored XSS in Open WebUI PDF Download Functionality by Open WebUI
CVE-2025-65959

8.7HIGH

Key Information:

Vendor

Open-webui

Status
Open-webui
Vendor
CVE Published:
4 December 2025

What is CVE-2025-65959?

Open WebUI, a self-hosted artificial intelligence platform, contains a Stored XSS vulnerability in its Notes PDF download feature prior to version 0.6.37. This vulnerability allows authenticated users to upload a Markdown file that includes malicious SVG tags. When another user downloads the note as a PDF, the attacker can execute arbitrary JavaScript code within the victim's session, leading to session token theft. Notably, unauthorized external attackers can also exploit this vulnerability by crafting specific Markdown files. A patch fixing this issue is available in version 0.6.37.

Affected Version(s)

open-webui < 0.6.37

References

https://github.com/open-webui/open-webui/security/advisor...
x_refsource_CONFIRM
https://github.com/open-webui/open-webui/commit/03cc6ce8e...
x_refsource_MISC

CVSS V3.1

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.