CVE-2025-63681

State: Published
Severity: 4.3 Medium
Published: Dec 4, 2025
Updated: Dec 5, 2025
Reserved: Oct 27, 2025

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	4.3 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N	CISA-ADP

Weaknesses

CWE-284 Improper Access Control

Affected Products

Product	Versions
n/an/a	n/aAffected

References

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

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