CVE-2025-27146: Matrix IRC Bridge allows IRC command injection to own puppeted user

February 25, 2025

The matrix-appservice-irc bridge up to version 3.0.3 contains a vulnerability which can lead to arbitrary IRC command execution as the puppeted user. The attacker can only inject commands executed as their own IRC user.

References

github.com/advisories/GHSA-5mvm-89c9-9gm5
github.com/matrix-org/matrix-appservice-irc
github.com/matrix-org/matrix-appservice-irc/commit/74f02c8e11f16ed1b355700092c1aa9c036a11bd
github.com/matrix-org/matrix-appservice-irc/security/advisories/GHSA-5mvm-89c9-9gm5
nvd.nist.gov/vuln/detail/CVE-2025-27146

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