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TI-2025-39887 Aliases CVE-2025-64495GHSA-w7xj-8fx7-wfch

Open WebUI vulnerable to Stored DOM XSS via prompts when 'Insert Prompt as Rich Text' is enabled resulting in ATO/RCE

Priority HIGH 71CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-79.

Summary

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. In versions 0.6.34 and below, the functionality that inserts custom prompts into the chat window is vulnerable to DOM XSS when 'Insert Prompt as Rich Text' is enabled, since the prompt body is assigned to the DOM sink .innerHtml without sanitisation. Any user with permissions to create prompts can abuse this to plant a payload that could be triggered by other users if they run the corresponding / command to insert the prompt. This issue is fixed in version 0.6.35.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00493 42nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed open-webui (open-webui): 0.6.35open-webui (npm): 0.6.35+1 more product

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
open-webuiopen-webuibefore 0.6.350.6.35Patch availableCNA
—open-webui (npm)before 0.6.350.6.35Patch availableGHSA-w7xj-8fx7-wfch
—open-webui (PyPI)before 0.6.350.6.35Patch availableGHSA-w7xj-8fx7-wfch
  • open-webui Vendoropen-webui Affected before 0.6.35 Fixed in 0.6.35 Patch available CNA
  • open-webui (npm) Vendor— Affected before 0.6.35 Fixed in 0.6.35 Patch available GHSA-w7xj-8fx7-wfch
  • open-webui (PyPI) Vendor— Affected before 0.6.35 Fixed in 0.6.35 Patch available GHSA-w7xj-8fx7-wfch

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:openwebui:open_webui:*:*:*:*:*:*:*:*before 0.6.35Vulnerableopen-webui
  • cpe:2.3:a:openwebui:open_webui:*:*:*:*:*:*:*:* Versions before 0.6.35 Vulnerable ·open-webui

Remediation

  • Fix · CNA open-webui (open-webui) Fixed in 0.6.35
  • Fix · GHSA-w7xj-8fx7-wfch open-webui (npm) Fixed in 0.6.35 Advisory →
  • Fix · GHSA-w7xj-8fx7-wfch open-webui (PyPI) Fixed in 0.6.35 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-64495
  2. 2026-10-03 Alias added: GHSA-w7xj-8fx7-wfch

References

Exploit 1

Patch 1

Advisory 1

Other 2

  • TI-2024-06216 Open WebUI Arbitrary File Upload + Path Traversal CVSS 3.1HIGH 8.8
  • TI-2024-07467 Improper Authentication in open-webui/open-webui CVSS 3.1HIGH 8.2
  • TI-2026-42359 Open WebUI: Cross-user code-interpreter and tool execution via unvalidated Socket.IO event-caller session_id CVSS 3.1CRITICAL 9.0
  • TI-2026-40759 open-webui - Remote Code Execution via CORS Misconfiguration and Session Validation CVSS 4.0CRITICAL 9.0
  • TI-2024-07431 Cross-site Scripting (XSS) in open-webui/open-webui CVSS 3.0CRITICAL 9.0
  • TI-2026-60021 Open WebUI: Same-origin XSS to account takeover via terminal port-preview iframe hardcoding allow-same-origin CVSS 3.1HIGH 8.7
See all 154 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences