What’s Vulnerable › Vulnerabilities

CVE-2025-63681

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-12-04 · updated 2026-06-17
• Weakness: CWE-284

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 products

• open-webui: 0.6.41

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

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