The Melapress Login Security plugin for WordPress is vulnerable to Authentication Bypass due to missing authorization within the getvaliduserbasedontoken() function in versions 2.1.0 to 2.1.1. This makes it possible for unauthenticated attackers who know an arbitrary user meta value to bypass authentication checks and log in as that user.
The MelaPress Login Security and MelaPress Login Security Premium plugins for WordPress is vulnerable to unauthorized loss of data due to a missing capability check on the 'monitoradminactions' function in version 2.1.0. This makes it possible for unauthenticated attackers to delete any user.