Open WebUI from 0.9.0 before 0.11.4 contains a denial of service vulnerability that allows authenticated users with automations permission to stall the instance by submitting unsatisfiable recurrence rules. Attackers can repeatedly send rules like February 30th to the automations create or update endpoints, blocking the shared event loop for seconds per request.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
High
Complete denial of service
CVSS Vector v4.0
Weakness Type (CWE)
References 3
https://github.com/open-webui/open-webui/commit/5fb869db221d9599a576e8e2eea9c33…
disclosure@vulncheck.com
https://github.com/open-webui/open-webui/security/advisories/GHSA-5w58-mwmh-vf2m
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/open-webui-0.9.0-before-0.11.4-denial-of-s…
disclosure@vulncheck.com