The BuddyPress plugin for WordPress is vulnerable to Deserialization of Untrusted Data in all versions up to, and including, 14.5.0 This is due to the bp_unserialize_profile_field() function using @unserialize() without the allowed_classes parameter on user-controlled XProfile field data. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary PHP objects via XProfile textbox fields, which could lead to remote code execution if a suitable POP chain is available in the WordPress environment.
Weakness
The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.
Potential Mitigations
- Make fields transient to protect them from deserialization.
- An attempt to serialize and then deserialize a class containing transient fields will result in NULLs where the transient data should be. This is an excellent way to prevent time, environment-based, or sensitive variables from being carried over and used improperly.
Related Attack Patterns
References
- https://owasp.org/www-community/vulnerabilities/PHP_Object_Injection
- https://plugins.trac.wordpress.org/browser/buddypress/tags/14.4.0/bp-xprofile/bp-xprofile-template.php#L1000
- https://plugins.trac.wordpress.org/browser/buddypress/trunk/bp-xprofile/bp-xprofile-functions.php#L519
- https://plugins.trac.wordpress.org/browser/buddypress/trunk/bp-xprofile/bp-xprofile-template.php#L1000
- https://plugins.trac.wordpress.org/browser/buddypress/trunk/bp-xprofile/classes/class-bp-rest-xprofile-fields-endpoint.php#L866
- https://plugins.trac.wordpress.org/changeset?old_path=%2Fbuddypress/tags/14.4.0\u0026new_path=%2Fbuddypress/tags/14.5.0
- https://www.php.net/manual/en/function.unserialize.php
- https://www.wordfence.com/threat-intel/vulnerabilities/id/467dd833-2f47-43cd-8d13-dffdad394b3c?source=cve