GHSA-wjwr-xfp9-r66p is a medium-severity (CVSS 6.5) CWE-613 vulnerability in open-webui. O3 Security confirms whether GHSA-wjwr-xfp9-r66p is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Open WebUI: Admin demoted through SSO role sync keeps read and write access to all users' notes
Exploitation Status
Proof-of-concept exploit code exists
- CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.
- A successful exploit gives an attacker total control of the affected component, not partial access.
Exploitation and automatability from CISA’s SSVC triage for GHSA-wjwr-xfp9-r66p.
Real-World Exposure
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Description
Summary
A user who is demoted from admin by an identity provider keeps admin-level read and write access to every user's notes, over any Socket.IO connection that was already open when the demotion happened. Open WebUI caches the user's role on the socket at connection time, and the two SSO role-sync paths, the reverse-proxy trusted role header and OAuth role mapping, changed the role in the database without tearing that cached session down. Only the admin user-management endpoints invalidated sessions, so a demotion driven by the identity provider left the old privileges live on the socket.
Preconditions
A role-sync SSO mode has to be enabled. Either trusted-header authentication with WEBUI_AUTH_TRUSTED_ROLE_HEADER set, which is unset by default, or OAuth with role mapping enabled, which is off by default. Deployments that change roles only through the admin panel are not affected, because that path already invalidated the user's sockets.
The account has to be an admin at the moment it opens a Socket.IO connection, has to keep that connection open across the demotion, and has to be demoted through the SSO path rather than through the admin panel. Signing out, reloading the page, or any network interruption ends the exposure, because the reconnect reads a fresh role from the database.
Impact
Until the socket closes, the demoted account can open and edit any user's note through the collaborative-notes socket handlers, which grant admins access to every note. That is read and write access to other users' private notes, held by someone the operator has already removed from the admin role.
The rest of the product is not affected. Every HTTP endpoint reads the role fresh from the database on each request, so the demoted account has no admin access to the REST API, no user management, no settings and no model or connection configuration. The exposure ends the moment the connection drops, and the account controls that only by keeping the browser tab open.
The realistic case is off-boarding or a least-privilege downgrade performed in the identity provider, which is a normal administrative action rather than a misconfiguration.
Fix
Fixed in 0.11.1 by commit ce3c175e260709f359d7e6cbb3132f0572098b95. Role changes and user deletions now publish an internal event, and a session handler tears down that user's Socket.IO connections whenever the event fires, so every path that can change a role invalidates cached sessions instead of only the admin endpoints. Upgrading is sufficient, no configuration change is needed.
Root cause
Affected components:
backend/open_webui/routers/auths.py, the trusted-header role sync in the sign-in handler.backend/open_webui/utils/oauth.py, the OAuth role sync run on login.backend/open_webui/socket/main.py, which caches the user record on the socket and authorizes the collaborative-notes handlers against that cached copy.
Session invalidation on role change was added as an explicit call, made at the call sites that changed a role rather than inside the role-change itself. The admin user-management endpoints made that call, the two SSO sync paths did not, and nothing else refreshed the role cached on an open socket. The socket keep-alive rewrites the cached record to reset the idle timer and preserves the stale role while doing so, so a connection that stays active is never reaped. Because the notes handlers grant full access to any note when the cached role reads admin, the gap turned into read and write access over all notes for as long as the connection lived.
Proof of concept
Deploy Open WebUI with trusted-header authentication and WEBUI_AUTH_TRUSTED_ROLE_HEADER set, or with OAuth role mapping enabled. Sign in as an admin and leave the browser open on a page holding a Socket.IO connection. Demote the account through the identity provider, meaning the next sign-in carries the role header set to user, or the account's group is changed at the OAuth provider. The database role is now user.
Over the connection that is still open, join and edit another user's note by its id. Both are granted, because the role cached on that socket still reads admin. Performing the same demotion through the admin panel instead drops the connection and revokes the access, which is the behaviour the SSO paths were missing.
This was established by source inspection against 0.11.0 rather than by an executed exploit.
Credits
Reported by @mtholmquist.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐍PyPI | open-webui | ≥ 0.9.0&&< 0.11.1 | 0.11.1 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for open-webui. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update open-webui to 0.11.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-wjwr-xfp9-r66p is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-wjwr-xfp9-r66p is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-wjwr-xfp9-r66p. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-wjwr-xfp9-r66p in your dependencies?
O3 detects GHSA-wjwr-xfp9-r66p across PyPI dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.