Event Manager and Tickets Selling Plugin for WooCommerce – WpEvently < 4.1.2 - Authenticated (Contributor+) PHP Object Injection in mep_event_meta_save

Description

The Event Manager and Tickets Selling Plugin for WooCommerce – WpEvently plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 4.1.1 via deserialization of untrusted input in the mep_event_meta_save function. This makes it possible for authenticated attackers, with contributor-level access and above, to inject a PHP Object. 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.