open-webui Open WebUI up to 0.6.34 Direct Connections Feature cross site scripting

Summaryinfo

A vulnerability identified as problematic has been detected in open-webui Open WebUI up to 0.6.34. Affected by this issue is some unknown functionality of the component Direct Connections Feature. This manipulation causes cross site scripting. This vulnerability is registered as CVE-2025-64496. Remote exploitation of the attack is possible. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in open-webui Open WebUI up to 0.6.34. It has been declared as problematic. Affected by this vulnerability is some unknown functionality of the component Direct Connections Feature. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity. The summary by CVE is:

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Versions 0.6.224 and prior contain a code injection vulnerability in the Direct Connections feature that allows malicious external model servers to execute arbitrary JavaScript in victim browsers via Server-Sent Event (SSE) execute events. This leads to authentication token theft, complete account takeover, and when chained with the Functions API, enables remote code execution on the backend server. The attack requires the victim to enable Direct Connections (disabled by default) and add the attacker's malicious model URL, achievable through social engineering of the admin and subsequent users. This issue is fixed in version 0.6.35.

The advisory is shared at github.com. This vulnerability is known as CVE-2025-64496 since 11/05/2025. The exploitation appears to be easy. The attack can be launched remotely. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

Upgrading to version 0.6.35 eliminates this vulnerability. Applying the patch 8af6a4cf21b756a66cd58378a01c60f74c39b7ca is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-38253). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• open-webui

Name

• Open WebUI

Version

• 0.6.0
• 0.6.1
• 0.6.2
• 0.6.3
• 0.6.4
• 0.6.5
• 0.6.6
• 0.6.7
• 0.6.8
• 0.6.9
• 0.6.10
• 0.6.11
• 0.6.12
• 0.6.13
• 0.6.14
• 0.6.15
• 0.6.16
• 0.6.17
• 0.6.18
• 0.6.19
• 0.6.20
• 0.6.21
• 0.6.22
• 0.6.23
• 0.6.24
• 0.6.25
• 0.6.26
• 0.6.27
• 0.6.28
• 0.6.29
• 0.6.30
• 0.6.31
• 0.6.32
• 0.6.33
• 0.6.34

License

• open-source

CPE 2.3info

• 🔒
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CPE 2.2info

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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