CVE-2025-63681: PYSEC-2026-1732 - open-webui is Vulnerable to Incorrect Access Control

CVE-2025-63681 · Severity: medium · CVSS 4.3 · Published 2025-12-04

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.

Technologies: Openwebui Open Webui, open-webui (PyPI). Vendors: Openwebui, PyPI.

Quick answers

Is CVE-2025-63681 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2025-63681 being exploited in the wild.
How severe is CVE-2025-63681?
Medium severity, with a CVSS score of 4.3, published 4 December 2025.
Which products and versions are affected?
open-webui (PyPI) ECOSYSTEM:introduced=0,fixed=0.9.0, ECOSYSTEM:introduced=0,last_affected=0.6.33.
Is there a fix for CVE-2025-63681?
Yes. open-webui (PyPI): upgrade to 0.9.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2025-63681?
Check whether you run Openwebui Open Webui or open-webui (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • open-webui (PyPI): upgrade to 0.9.0 or later
    pip install "open-webui>=0.9.0"

Affected products

  • Openwebui Open Webui
  • open-webui (PyPI) ECOSYSTEM:introduced=0,fixed=0.9.0, ECOSYSTEM:introduced=0,last_affected=0.6.33

Identifiers

  • CVE-2025-63681
  • GHSA-frv8-gffc-37px
  • PYSEC-2026-1732

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