4.3

CVE-2025-63681: openwebui open_webui Improper Access Control

CVSS: 4.3v3.1MediumModified
AliasesGHSA-frv8-gffc-37pxPYSEC-2026-1732
Published 04-12-2025Last modified 05-12-2025
Open JSON

Vulnerability summary

CVE-2025-63681 is a medium (CVSS 4.3) Improper Access Control vulnerability in openwebui open_webui. EPSS estimates a 0.28% chance of exploitation in the next 30 days, higher than 19.7% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
27/100
0100
Medium · default modelHow is this calculated?
CVSS score
4.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.28%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github

Timeline

  1. 04-12-2025
    PublishedVulnerability first disclosed.
  2. 05-12-2025
    Last modifiedVulnerability information updated.

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.

CVSS metrics

3 scores · 3 sources · 2 versions

EPSS trend

Probability

0.28%

Chance of exploitation in the next 30 days

Percentile

20%

Versus all other CVEs

30-day change

0.00 pp

From 0.28% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.28%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • githubUnverified

    Pocs

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Openwebui1 product
PyPI1 product
  • open-webui≤ 0.6.33 | < 0.9.0

2 vendors · 2 products

References

7 links