GiveWP <= 2.25.3 - Authenticated (Admin+) PHP Object Injection

The GiveWP plugin for WordPress is vulnerable to PHP Object Injection in versions up to, and including, 2.25.3 via deserialization of untrusted input via the $output['main_key'] value. This allows authenticated attackers, with administrative privileges, to inject a PHP Object that will deserialize upon a data export. 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.