The OG access fields (visibility fields) implementation in Organic Groups (OG) module 7.x-2.x before 7.x-2.3 for Drupal does not properly restrict access to private groups, which allows remote authenticated users to guess node IDs, subscribe to, and read the content of arbitrary private groups via unspecified vectors.

The Organic Groups Menu (aka OG Menu) module before 7.x-2.2 for Drupal allows remote authenticated users with the "access administration pages" permission to change module settings via unspecified vectors.