CVE-2025-63681

Name: CVE-2025-63681
Creator: NVD / NIST
Published: 2025-12-04T16:16:22.447+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.3/10EPSS 0.26%

Last modified Jun 17, 2026

CVE-2025-63681 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. 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.. EPSS estimates a 0.26% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

4.3/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

EPSS Probability

0.26%

17.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-284

Affected Software

Vendor	Product	Versions
Openwebui	Open Webui	0.6.41

References

https://github.com/TOAST-Research/pocs/blob/main/openwebui/arbitirary_task_stop/report.mdExploit, Third Party Advisory
https://github.com/open-webui/open-webui/blob/46ae3f4f5d7d4d706041bdae4ad2d802e568712b/backend/open_webui/main.py#L1652Product
https://github.com/TOAST-Research/pocs/blob/main/openwebui/arbitirary_task_stop/report.mdExploit, Third Party Advisory

Timeline

Published: Dec 4, 2025
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2025-63681?

How severe is CVE-2025-63681?

CVE-2025-63681 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 0.26% probability of exploitation in the next 30 days.

How do I fix CVE-2025-63681?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-63681?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST