What’s Vulnerable › Vulnerabilities

CVE-2025-23197: matrix-hookshot has a Potential Denial of Service when Hookshot is configured with GitHub support

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-01-27 · updated 2026-06-17
• Weakness: CWE-754

Description

matrix-hookshot is a Matrix bot for connecting to external services like GitHub, GitLab, JIRA, and more. When Hookshot 6 version 6.0.1 or below, or Hookshot 5 version 5.4.1 or below, is configured with GitHub support, it is vulnerable to a Denial of Service (DoS) whereby it can crash on restart due to a missing check. The impact is greater to you untrusted users can add their own GitHub organizations to Hookshot in order to connect their room to a repository. This vulnerability is fixed in 6.0.2 and 5.4.2.

Affected products

• matrix-org matrix-hookshot: from 6.0.0, < 6.0.2; before 5.4.2

References

• https://github.com/matrix-org/matrix-hookshot/commit/e51d8210233ac759e7f7dfebc2c4f1bf6ce94802
• https://github.com/matrix-org/matrix-hookshot/security/advisories/GHSA-cr4q-jf47-3645

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