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

Source: https://junglewise.ai/threats/cve-2025-63681-open-webui-is-vulnerable-to-incorrect-access-control  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-12-04  
License: CC BY 4.0 with a link back

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](https://junglewise.ai/threats/technologies/openwebui-open-webui), [open-webui (PyPI)](https://junglewise.ai/threats/technologies/open-webui). Vendors: [Openwebui](https://junglewise.ai/threats/vendors/openwebui), [PyPI](https://junglewise.ai/threats/vendors/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

  ```sh
  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

## Related threats

- [Open WebUI OAuth token exchange authorization bypass](https://junglewise.ai/threats/cve-2026-88006-open-webui-oauth-token-exchange-authorization-bypass)
- [Open WebUI OAuth token exchange authorization bypass](https://junglewise.ai/threats/cve-2026-88005-open-webui-oauth-token-exchange-authorization-bypass)
- [Open WebUI infinite loop denial of service in chat history reconstruction](https://junglewise.ai/threats/cve-2026-88002-open-webui-infinite-loop-denial-of-service-in-chat-history)
- [Open WebUI server-side request forgery via unvalidated HTTP redirects](https://junglewise.ai/threats/cve-2026-88001-open-webui-server-side-request-forgery-via-unvalidated-http)
- [Open WebUI denial of service via cyclic chat tree message deletion](https://junglewise.ai/threats/cve-2026-88000-open-webui-denial-of-service-via-cyclic-chat-tree-message)