CVE-2025-63681

open-webui v0.6.33 is vulnerable to Incorrect Access Control. The API /api/tasks/stop/ directly accesses and cancels tasks without verifying user ownership, enabling attackers (a normal user) to stop arbitrary LLM response tasks.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
4.3 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
mitreCNA
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CISA-ADPADP
4.3 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 1%
VendorProductVersion
openwebuiopen_webui
0.6.41
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://github.com/TOAST-Research/pocs/blob/main/openwebui/arbitirary_task_stop/report.md
https://github.com/open-webui/open-webui/blob/46ae3f4f5d7d4d706041bdae4ad2d802e568712b/backend/open_webui/main.py#L1652
https://github.com/TOAST-Research/pocs/blob/main/openwebui/arbitirary_task_stop/report.md