Cross-site scripting in Open WebUI - #VU130239
Published: May 6, 2026
Vulnerability identifier: #VU130239
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear
CVE-ID: N/A
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Open WebUI
Affected software:
Open WebUI
Open WebUI
Detailed vulnerability description
The vulnerability allows a remote user to execute arbitrary JavaScript in the browser context of a pending user.
The vulnerability exists due to cross-site scripting in the AccountPending.svelte pending user overlay component when rendering admin-configured markdown content. A remote privileged user can configure a crafted markdown link with a javascript: URI to execute arbitrary JavaScript in the browser context of a pending user.
User interaction is required to click the crafted link in the pending user overlay.
Remediation
Install security update from vendor's website.