cvedb.io
CVE-2024-39691
MEDIUM · CVSS 4.3
EPSS exploitation probability: 0%
Published 2024-07-05T19:15:10.460 · Last modified 2026-06-17T07:42:28.877

Summary

matrix-appservice-irc is a Node.js IRC bridge for the Matrix messaging protocol. The fix for GHSA-wm4w-7h2q-3pf7 / CVE-2024-32000 included in matrix-appservice-irc 2.0.0 relied on the Matrix homeserver-provided timestamp to determine whether a user has access to the event they're replying to when determining whether or not to include a truncated version of the original event in the IRC message. Since this value is controlled by external entities, a malicious Matrix homeserver joined to a room in which a matrix-appservice-irc bridge instance (before version 2.0.1) is present can fabricate the timestamp with the intent of tricking the bridge into leaking room messages the homeserver should not have access to. matrix-appservice-irc 2.0.1 drops the reliance on `origin_server_ts` when determini

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.