EPSS
Percentile
61.8%
Matrix Synapse before 1.5.0 mishandles signature checking on some federation APIs. Events sent over /send_join, /send_leave, and /invite may not be correctly signed, or may not come from the expected servers.
github.com/advisories/GHSA-cppw-2mf8-qpm5
github.com/matrix-org/synapse/pull/6262
github.com/matrix-org/synapse/releases/tag/v1.5.0