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archive/Patch now/AIR-2025-0508
closedclosed 4 Dec 2025Patch now2 Disclosed vulnerabilityAI

Open WebUI Stored XSS Vulnerability CVE-2025-65959

Open WebUI

Open WebUI contains a stored cross-site scripting vulnerability in its notes PDF download feature via imported markdown files with malicious SVG tags. Attackers can execute arbitrary JavaScript and steal session tokens.

disclosed CVENo confirmed exploitation, so this record is tracked as a disclosed vulnerability and not counted as an incident. It moves into the counts if CISA or the vendor confirms exploitation. Why

CVSS
8.7
EPSS
<0.01 · top 84% · 2026-11-13
EPSS scores by FIRST
fix status
Fix status unknown
first report
4 Dec 2025
last update
4 Dec 2025
CVE ids
CVE-2025-65959other records

Timeline · 1

  1. 4 Dec 2025CVE-2025-65959: Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline.

Sources · 1

Advisories and databases

  1. 2025-12-04
    CVE-2025-65959: Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline.
    NVD · nvd.nist.gov/vuln/detail/CVE-2025-65959

Titles and links belong to their publishers. The summary above is written by gcdRadar in its own words; data is CC BY-SA 4.0.

Classification

lane
Patch now
AI role
Attack on AI
categories
Infrastructure vulnerability
severity
2 · Disclosed vulnerability
fix status
Fix status unknown
targets
Framework / tooling
owasp llm top 10
LLM03:2025 Supply Chain
mitre atlas
no technique for these categories
tags
xss
dates
happened 4 Dec 2025 · first reported 4 Dec 2025
origin
NVD
Vulnerability record from NVD / the GitHub Advisory Database. This product uses the NVD API but is not endorsed or certified by the NVD.
record
confidence 0.95 · created 2026-10-18 10:04Z · updated 2026-10-18 10:04Z

Lane, AI role, categories and severity come from the classifier; the OWASP and ATLAS rows are derived from the categories. How these are assigned

Copy a brief

This record as a short Markdown brief, for a ticket, a chat or a coding agent.

the brief as text
# Open WebUI Stored XSS Vulnerability CVE-2025-65959

https://gcdradar.vercel.app/incidents/open-webui-stored-xss-vulnerability-cve-2025-65959 · AIR-2025-0508 · closed 2025-12-04

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2025-12-04
- AI role: Attack on AI
- Products: Open WebUI
- CVE ids: CVE-2025-65959
- CVSS: 8.7

## Summary

Open WebUI contains a stored cross-site scripting vulnerability in its notes PDF download feature via imported markdown files with malicious SVG tags. Attackers can execute arbitrary JavaScript and steal session tokens.

## What to do

No action recorded; read the sources below and the vendor's advisory.

## Latest updates

- 2025-12-04: CVE-2025-65959: Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. (https://nvd.nist.gov/vuln/detail/CVE-2025-65959)

## Sources

- 2025-12-04 NVD: CVE-2025-65959: Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. https://nvd.nist.gov/vuln/detail/CVE-2025-65959

Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.

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