CVE-2025-63681
EPSS 0.01%open-webui is Vulnerable to Incorrect Access Control
Published: 12/4/2025Modified: 12/5/2025
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.
Affected packages (1)
- PyPI/open-webuifrom 0, <= 0.6.33
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P |
References (4)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2025-63681
- PATCHhttps://github.com/open-webui/open-webui
- WEBhttps://github.com/open-webui/open-webui/blob/46ae3f4f5d7d4d706041bdae4ad2d802e568712b/backend/open_webui/main.py#L1652
- WEBhttps://github.com/TOAST-Research/pocs/blob/main/openwebui/arbitirary_task_stop/report.md