Matrix SDK is vulnerable to message impersonation. An attacker with a malicious homeserver can construct messages appearing to have come from a specific person.
github.com/matrix-org/matrix-js-sdk/commit/a587d7c36026fe1fcf93dfff63588abee359be76
github.com/matrix-org/matrix-js-sdk/releases/tag/v19.7.0
github.com/matrix-org/matrix-js-sdk/security/advisories/GHSA-6263-x97c-c4gg
github.com/matrix-org/matrix-spec-proposals/pull/3061
matrix.org/blog/2022/09/28/upgrade-now-to-address-encryption-vulns-in-matrix-sdks-and-clients
security.gentoo.org/glsa/202210-35