Vulnerability details

CVE-2025-64495

open-webui open-webui

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

CVSS 3.1

8.7High

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.

CVSS scores

Score	Version	Source	Vector
8.7High	3.1	CVEProject cvelistV5 (CNA) (GitHub_M)	`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N`

Affected products

Vendor	Product	Versions	Source
open-webui	open-webui	< 0.6.35	CVEProject cvelistV5 (CNA)

References and advisories

https://github.com/open-webui/open-webui/security/advisories/GHSA-w7xj-8fx7-wfch x_refsource_CONFIRM
https://github.com/open-webui/open-webui/commit/eb9c4c0e358c274aea35f21c2856c0a20051e5f1 x_refsource_MISC
https://github.com/open-webui/open-webui/blob/7a83e7dfa367d19f762ec17cac5e4a94ea2bd97d/src/lib/components/common/RichTextInput.svelte#L348 x_refsource_MISC

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Details

Published: 2025-11-08
Last updated: 2025-11-10
State: Published
Assigner (CNA): GitHub_M

Exploit prediction (EPSS)

0.49%

Probability of exploitation in 30 days

42.6%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: No
Exploitation: Proof of concept
Technical impact: Partial

Weaknesses (CWE)

CWE-79
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')