Improperly formed beacon events can disrupt or impede the matrix-js-sdk from functioning properly(CVE-2022-39236) Too permissive key forwarding strategy allowing impersonation (CVE-2022-39249) Trusting/verifying the user identity under the control of the homeserver instead of the intended one. (CVE-2022-39250) Fake to-device messages appearing to originate from another user. (CVE-2022-39251)