CVE-2025-46719Public exploitNetwork attack vector

Account takeover and server RCE via unsanitized iframe

Published May 5, 2025 · Updated May 5, 2025

Stored XSS in Open WebUI before 0.6.6 allows remote attackers to execute JavaScript when a user opens a crafted chat transcript. MarkdownTokens.svelte sends any HTML token containing the local file-iframe prefix directly to Svelte's raw HTML sink, leaving event attributes unsanitized. A victim must open a shared transcript; injected code can steal the browser access token, take over the account, and reach backend code execution when the victim is an administrator.

CVSS severity6.4
Medium
EPSS probability0.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Stored XSS in Open WebUI before 0.6.6 allows remote attackers to execute JavaScript when a user opens a crafted chat transcript. MarkdownTokens.svelte sends any HTML token containing the local file-iframe prefix directly to Svelte's raw HTML sink, leaving event attributes unsanitized. A victim must open a shared transcript; injected code can steal the browser access token, take over the account, and reach backend code execution when the victim is an administrator.

The record

CVE
CVE-2025-46719
Published
May 5, 2025
Updated
May 5, 2025
Vendor
Open WebUI
Product
Open WebUI
Classifications
CWE-79, CWE-80, T1528, T1203
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. May 5, 2025CVE publishedPublication date reported by the CVE source.
  2. May 5, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=< 0.6.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

Open WebUI · Open WebUIversion=< 0.6.6

Published CVSS scores

6.4NISTCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N
5.4NISTCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-80Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
T1528Steal Application Access Token
T1203Exploitation for Client Execution

Public exploit references

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

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo