Search and filter pro <= 2.5.19 - Missing Authorization to Authenticated (Subscriber+) Post Meta Exposure

The Search & Filter Pro plugin for WordPress is vulnerable to unauthorized access of data due to a missing capability check on the 'get_meta_values' function in all versions up to, and including, 2.5.19. This makes it possible for authenticated attackers, with Subscriber-level access and above, to read the values of arbitrary post meta.