CVE-2025-23197: matrix-hookshot has a Potential Denial of Service when Hookshot is configured with GitHub support
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.
Classification
CVE ID: CVE-2025-23197
CVSS Base Severity: MEDIUM
CVSS Base Score: 6.5
Affected Products
Vendor: matrix-org
Product: matrix-hookshot
Exploit Prediction Scoring System (EPSS)
EPSS Score: 0.04% (probability of being exploited)
EPSS Percentile: 11.72% (scored less or equal to compared to others)
EPSS Date: 2025-02-25 (when was this score calculated)
References
https://github.com/matrix-org/matrix-hookshot/security/advisories/GHSA-cr4q-jf47-3645https://github.com/matrix-org/matrix-hookshot/commit/e51d8210233ac759e7f7dfebc2c4f1bf6ce94802