SEOPress <= 6.5.0.2 - Authenticated (Administrator+) PHP Object Injection

The SEOPress plugin for WordPress is vulnerable to PHP Object Injection in versions up to, and including, 6.5.0.2 via deserialization of untrusted input of the $redirect_value['sources'] value triggered to an import with the seopress_import_rk_redirections function. This allows authenticated attackers, with administrator-level 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.