CVE-2025-64495 Open WebUI vulnerable to Stored DOM XSS via prompts when 'Insert Prompt as Rich Text' is enabled resulting in ATO/RCE
Stored DOM XSS in Open WebUI allows attackers to execute arbitrary code or take over accounts via malicious prompts when rich text insertion is enabled.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2025-64495?
CVE-2025-64495 is a high-severity cross-site scripting vulnerability in Openwebui Open Webui, published on 8 Nov 2025. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-79
Which versions are affected by CVE-2025-64495?
5 open source packages ship an affected version, including open-webui. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
open-webui PyPI | All versions | 0.6.35 |
open-webui PyPI | All versions | 0.6.35 |
open-webui PyPI | All versions | 0.6.35 |
open-webui npm | All versions | 0.6.35 |
open-webui npm | All versions | 0.6.35 |
Products include Openwebui Open Webui.
How do I fix CVE-2025-64495?
Upgrade open-webui to 0.6.35 or later.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2025-64495 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-64495 exists.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in Openwebui Open Webui
- CVE-2026-44551 Open WebUI: LDAP Empty Password Authentication Bypass
- CVE-2026-56400 open-webui - Remote Code Execution via CORS Misconfiguration and Session Validation
- CVE-2024-8017 Cross-site Scripting (XSS) in open-webui/open-webui
- CVE-2026-45672 Open WebUI: Jupyter code execution works despite `ENABLE_CODE_EXECUTION=false` — feature gate bypassed
- CVE-2026-87995 Open WebUI: Same-origin XSS to account takeover via terminal port-preview iframe hardcoding allow-same-origin
Sources
Also known as GHSA-w7xj-8fx7-wfch, PYSEC-2026-1741.