CVE-2025-64495Public exploitNetwork attack vector

Stored DOM XSS via unsanitized rich-text prompts

Published Nov 8, 2025 · Updated Nov 8, 2025

Stored DOM XSS in Open WebUI before 0.6.35 allows remote authenticated users to execute JavaScript through crafted custom prompts. RichTextInput.svelte parses the prompt body as HTML and assigns it to a temporary div's innerHTML without sanitizing attacker-controlled markup. Exploitation requires prompt-creation permission, the victim's off-by-default rich-text setting, and the victim to run the prompt command; a victim session can be stolen, and an administrator's session can be abused to execute server-side Python.

CVSS severity8.7
High
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored DOM XSS in Open WebUI before 0.6.35 allows remote authenticated users to execute JavaScript through crafted custom prompts. RichTextInput.svelte parses the prompt body as HTML and assigns it to a temporary div's innerHTML without sanitizing attacker-controlled markup. Exploitation requires prompt-creation permission, the victim's off-by-default rich-text setting, and the victim to run the prompt command; a victim session can be stolen, and an administrator's session can be abused to execute server-side Python.

The record

CVE
CVE-2025-64495
Published
Nov 8, 2025
Updated
Nov 8, 2025
Vendor
Open WebUI
Product
Open WebUI
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 8, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 8, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.6.35

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Open WebUI · Open WebUIversion=< 0.6.35

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
8.7GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript/JScript

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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