Update the WordPress BP Better Messages plugin to the latest available version (at least 184.108.40.206).
An unknown person discovered and reported this Cross Site Request Forgery (CSRF) vulnerability in WordPress BP Better Messages Plugin. This could allow a malicious actor to force higher privileged users to execute unwanted actions under their current authentication. For example a password change which will then allow the malicious actor to login into the admin account. This vulnerability has been fixed in version 220.127.116.11.
Messaging Block Bypass vulnerability
ServerSide Request Forgery (SSRF) vulnerability
Denial Of Service (DoS) vulnerability
Sensitive Information Disclosure vulnerability
CrossSite Request Forgery (CSRF) vulnerability