The SpeedyCache plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the speedycachesavevarniship, speedycacheimgupdatesettings, speedycachepreloadingaddsettings, and speedycachepreloadingdeleteresource functions in all versions up to, and including, 1.1.3. This makes it possible for authenticated attackers, with subscriber-level access and above, to update plugin options.