The User module in Drupal 7.x before 7.44 allows remote authenticated users to gain privileges via vectors involving contributed or custom code that triggers a rebuild of the user profile form.

References

• https://nvd.nist.gov/vuln/detail/CVE-2016-6211
• https://www.drupal.org/SA-CORE-2016-002
• http://www.debian.org/security/2016/dsa-3604
• http://www.openwall.com/lists/oss-security/2016/07/13/4
• http://www.openwall.com/lists/oss-security/2016/07/13/7
• http://www.securityfocus.com/bid/91230
• https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/core/CVE-2016-6211.yaml
• https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/drupal/CVE-2016-6211.yaml