Description
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.0 until 0.11.0, the terminal file-preview serveUrl iframe branch always granted allow-same-origin together with allow-scripts for HTML files served from the application origin. Any authenticated user with access to a configured terminal server could cause script in a previewed file to run in the Open WebUI origin, read the victim's session token from localStorage, and take over the account, with possible server-side code execution if the victim was an admin or held workspace.functions. This issue is fixed in 0.11.0.
Affected products
openwebui: open webui
References4
- github.com/open-webui/open-webui/pull/26907 PatchVendor Advisory
- github.com/open-webui/open-webui/security/advisories/GHSA-3xpf-… ExploitPatchVendor Advisory
- github.com/open-webui/open-webui/commit/65a5fad7b97db99d490d81f… Patch
- github.com/open-webui/open-webui/releases/tag/v0.11.0 Release Notes
Metrics
- CVSS 3.1
-
5.4
MEDIUM
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N - EPSS — exploit probability
- 0% percentile: 32 · as of 13 November 2026
- CWE
- CWE-79CWE-1021
Could this be exploited in your environment?
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