Microsoft is providing notification of the discovery and remediation of a vulnerability affecting the popular social networking site, Facebook.com. Microsoft discovered and disclosed the vulnerability under coordinated vulnerability disclosure to the affected vendor, Facebook Inc. Facebook Inc. has remediated the vulnerability in Facebook.com.
A vulnerability exists in the way that Facebook.com had previously implemented protection against clickjacking attacks. An attacker could exploit this vulnerability to circumvent Facebook privacy settings and expose potentially sensitive user information. An attacker who successfully exploited this vulnerability could take complete control of a user’s Facebook.com account and could perform any action on behalf of the user, such as read potentially sensitive data, change data, and delete contacts.
Microsoft Vulnerability Research reported this issue to and coordinated with Facebook to ensure remediation of this issue. For more information from Facebook, see Facebook Security.