جزئیات آسیب‌پذیری

The UsersWP plugin for WordPress is vulnerable to Arbitrary File Deletion in versions up to, and including, 1.2.65. This is due to insufficient validation of file-field values in the UsersWP_Validation::validate_fields() function (which falls through to sanitize_text_field() for fields of type 'file', leaving directory-traversal sequences intact) combined with the UsersWP_Forms::upload_file_remove() AJAX handler building the deletion target from the uploads basedir concatenated with the attacker-controlled metadata value without any realpath canonicalization or uploads-directory boundary check before calling unlink(). This makes it possible for authenticated attackers, with Subscriber-level access and above, to delete arbitrary files on the affected site's server, including wp-config.

• https://www.wordfence.com/threat-intel/vulnerabilities/id/b6cf6390-480f-44e2-ae36-67e3398add33?source=cve
• https://plugins.trac.wordpress.org/browser/userswp/tags/1.2.65/includes/class-forms.php#L2323
• https://plugins.trac.wordpress.org/browser/userswp/tags/1.2.65/includes/class-forms.php#L2320
• https://plugins.trac.wordpress.org/browser/userswp/tags/1.2.65/includes/class-validation.php#L190
• https://plugins.trac.wordpress.org/browser/userswp/tags/1.2.65/includes/class-forms.php#L1059
• https://plugins.trac.wordpress.org/browser/userswp/tags/1.2.65/includes/class-forms.php#L1973
• https://plugins.trac.wordpress.org/changeset/3590340/userswp
• https://github.com/AyeCode/userswp/commit/ddb17ad30ff3384cda85c5f372db30b03bd45ac8