The Services module 6.x-3.x before 6.x-3.3 and 7.x-3.x before 7.x-3.3 for Drupal allows remote authenticated users with the "access user profiles" permission to access arbitrary users' emails via vectors related to the "user index method" and "the path to the user resource."

Services 5.x before 5.x-0.92 and 6.x before 6.x-0.13, a module for Drupal, does not sign all required data in requests, which has unspecified impact, probably related to man-in-the-middle attacks that modify critical data and allow remote attackers to impersonate other users and gain privileges.

Services 5.x before 5.x-0.92 and 6.x before 6.x-0.13, a module for Drupal, does not use timeouts for signed requests, which allows remote attackers to impersonate other users and gain privileges via a replay attack that sends the same request.

Services 5.x before 5.x-0.92 and 6.x before 6.x-0.13, a module for Drupal, uses an insecure hash when signing requests, which allows remote attackers to impersonate other users and gain privileges.