Open WebUI stored cross-site scripting (XSS) vulnerability

published 2025-03-20 last yr. modified 2026-07-07 4mo ago also CVE-2024-7990 , PYSEC-2026-1734

cvss: 8.4; version 3.0, GitHub
cisa kev: Not listed; not in CISA's catalog
epss: —; no score, EPSS covers CVEs only
public exploits: 0; none known

A stored cross-site scripting (XSS) vulnerability exists in open-webui/open-webui version 0.3.8. The vulnerability is present in the `/api/v1/models/add` endpoint, where the model description field is improperly sanitized before being rendered in chat. This allows an attacker to inject malicious scripts that can be executed by any user, including administrators, potentially leading to arbitrary code execution.

Is GHSA-gj27-76gq-5v3p in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

CVSS scores

assigned by	version	score	vector
OSV	3.0	8.4	CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H
GitHub	3.0	8.4	CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H

Affected packages

ecosystem	package	affected	fixed in
pypi	open-webui	<=0.3.8	no fix listed

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

nvd.nist.gov /vuln/detail/CVE-2024-7990
advisory
github.com /open-webui/open-webui
package
huntr.com /bounties/2256e336-0f67-449e-a82d-7fc57081a21c
web
pypi.org /project/open-webui
package
github.com /advisories/GHSA-gj27-76gq-5v3p
advisory

Sources

GitHub Advisory GHSA-gj27-76gq-5v3p
OSV PYSEC-2026-1734

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.