CVE-2025-63681 json
open-webui is Vulnerable to Incorrect Access Control
published 11mo ago modified 5d ago also GHSA-frv8-gffc-37px , PYSEC-2026-1732 , EUVD-2025-201164
- cvss
- 4.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 23%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
Is CVE-2025-63681 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 11mo ago
Exploit prediction
0.30% chance of exploitation in the next 30 days, higher than 23% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- github.com https://github.com/TOAST-Research/pocs/blob/main/openwebui/arbitirary_task_stop/report.md referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
| NVD | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
| CNA | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | open-webui | <=0.6.33 <0.9.0 |
0.9.0 |
Classification
- Weakness
-
- CWE-284 Improper Access Control
References
-
github.com
/open-webui/open-webui/commit/e7ff4768f8ffe1924b4576381c9e45e8a64350e4
patch
-
github.com
/TOAST-Research/pocs/blob/main/openwebui/arbitirary_task_stop/report.md
exploit, web, third-party-advisory
-
github.com
/open-webui/open-webui/blob/46ae3f4f5d7d4d706041bdae4ad2d802e568712b/backend/open_webui/main.py#L1652
web, product
-
nvd.nist.gov
/vuln/detail/CVE-2025-63681
advisory
-
github.com
/open-webui/open-webui
package
-
pypi.org
/project/open-webui
package
-
github.com
/advisories/GHSA-frv8-gffc-37px
advisory
Sources
- CVE List CVE-2025-63681
- GitHub Advisory GHSA-frv8-gffc-37px
- NVD CVE-2025-63681
- OSV PYSEC-2026-1732
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.