CVE-2025-46719: Open WebUI vulnerable to stored XSS via unescaped markdown token in MarkdownTokens.svelte leading to full account takeover and RCE via functions
First published: Mon May 05 2025(Updated: )
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to version 0.6.6, a vulnerability in the way certain html tags in chat messages are rendered allows attackers to inject JavaScript code into a chat transcript. The JavaScript code will be executed in the user's browser every time that chat transcript is opened, allowing attackers to retrieve the user's access token and gain full control over their account. Chat transcripts can be shared with other users in the same server, or with the whole open-webui community if "Enable Community Sharing" is enabled in the admin panel. If this exploit is used against an admin user, it is possible to achieve Remote Code Execution on the server where the open-webui backend is hosted. This can be done by creating a new function which contains malicious python code. This vulnerability also affects chat transcripts uploaded to `https://openwebui.com/c/<user>/<chat_id>`, allowing for wormable stored XSS in https[:]//openwebui[.]com. Version 0.6.6 contains a patch for the issue.
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Open WebUI | <0.6.6 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2025-46719?
CVE-2025-46719 is classified as a medium severity vulnerability due to the potential for JavaScript injection in chat messages.
How do I fix CVE-2025-46719?
To fix CVE-2025-46719, upgrade Open WebUI to version 0.6.6 or later where the vulnerability has been patched.
What type of attack is associated with CVE-2025-46719?
CVE-2025-46719 is associated with cross-site scripting (XSS) attacks that allow attackers to execute malicious JavaScript.
What versions of Open WebUI are affected by CVE-2025-46719?
Open WebUI versions prior to 0.6.6 are affected by CVE-2025-46719.
Can CVE-2025-46719 lead to data breach?
Yes, CVE-2025-46719 can potentially lead to data breaches as it allows unauthorized script execution that could access sensitive information.
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