Ad Inserter <= 2.7.25 - Authenticated (Admin+) PHP Object Injection

The Ad Inserter plugin for WordPress is vulnerable to PHP Object Injection in versions up to, and including, 2.7.25 via deserialization of untrusted input from the $exported_settings variable when importing settings. This allows authenticated attackers, with administrative privileges, to inject a PHP Object. No POP chain is present in the vulnerable plugin. If a POP chain is present via an additional plugin or theme installed on the target system, it could allow the attacker to delete arbitrary files, retrieve sensitive data, or execute code.