8.7

CVSS Score

3.1

-

CVSS Score

Basic Information

Concerned about an active attack path?

Talk to our security experts and see Miggo in action.

Miggo Vulnerability Database

→

CVE-2025-64495

CVE-2025-64495: Open WebUI vulnerable to Stored DOM XSS via prompts when 'Insert Prompt as Rich Text' is enabled resulting in ATO/RCE

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.

(GitHub Advisory)

Miggo Vulnerability Database

→

CVE-2025-64495

CVE-2025-64495:

8.7

CVSS Score

3.1

-

CVSS Score

Basic Information

Is this CVE running in your environment?

Easily map the attack path and prioritize which CVEs are a threat to your organization

Validate Exposure

Technical Details

SSVC / BOD 26-04 ↗

Exploitation pocAutomatable NoTech Impact Partial

Select your environment

→SSVCDeferfix on upgrade

Runtime reachability resolves your actual outcome.Book a demo

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
open-webui	npm	<= 0.6.34	0.6.35
open-webui	pip	<= 0.6.34	0.6.35

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The vulnerability exists in the open-webui frontend application, specifically within a Svelte component responsible for handling rich text input. The analysis of the security advisory and the associated patch commit eb9c4c0e358c274aea35f21c2856c0a20051e5f1 confirms the root cause. The function replaceCommandWithText in src/lib/components/common/RichTextInput.svelte takes text from a user-created prompt, converts it to HTML using the marked library, and then prepares it for DOM insertion. The vulnerability is a classic DOM XSS, where untrusted content is passed to an innerHTML sink without proper sanitization. The marked library explicitly states it does not sanitize HTML, which is the core of the issue. An attacker with permissions to create prompts can store a malicious JavaScript payload. When a victim user, with the 'Insert Prompt as Rich Text' feature enabled, uses that prompt, the replaceCommandWithText function is called, and the payload executes. The patch confirms this by introducing DOMPurify.sanitize to clean the HTML generated by marked before it can be rendered, thus neutralizing the XSS threat.

Vulnerable functions

Only Mi**o us*rs **n s** t*is s**tion

Vulnerability Intelligence
Miggo AI

Unlock WAF rules for this CVE

Generate vendor-ready rules for the observed attack patterns, plus reasoning and safe deployment guidance

Get WAF rules

WAF Protection Rules

WAF Rule

W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.

Reasoning

*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.