CVE-2025-61926

MEDIUM EPSS 28.0%
Published Oct 9, 20258mo ago · Modified Jun 17, 20262w ago
4.6 CVSS 4.0
Medium
Find Similar
Published Oct 9, 2025 8mo ago
Last Modified Jun 17, 2026 2w ago

Description

Allstar is a GitHub App to set and enforce security policies. In versions prior to 4.5, a vulnerability in Allstar’s Reviewbot component caused inbound webhook requests to be validated against a hard-coded, shared secret. The value used for the secret token was compiled into the Allstar binary and could not be configured at runtime. In practice, this meant that every deployment using Reviewbot would validate requests with the same secret unless the operator modified source code and rebuilt the component - an expectation that is not documented and is easy to miss. All Allstar releases prior to v4.5 that include the Reviewbot code path are affected. Deployments on v4.5 and later are not affected. Those who have not enabled or exposed the Reviewbot endpoint are not exposed to this issue.

CVSS Details

Base Score
4.6
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
28.0% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 2

CWE-453
CWE-798 Use of Hard-coded Credentials Authentication

References 4

  • github.com https://github.com/ossf/allstar/blob/294ae985cc2facd0918e8d820e4196021aa0b914/pkg/reviewbot/reviewbot.go#L59
  • github.com https://github.com/ossf/allstar/commit/e004ecb540d63ca6f5b1689b41af6c0040a82c73
  • github.com https://github.com/ossf/allstar/pull/713
  • github.com https://github.com/ossf/allstar/security/advisories/GHSA-33f4-mjch-7fpr

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.