WPBruiser {no- Captcha anti-Spam} <= 3.1.43 - Unauthenticated PHP Object Injection

Description

The WPBruiser {no- Captcha anti-Spam} plugin for WordPress is vulnerable to PHP Object Injection in versions up to, and including, 3.1.43 via deserialization of untrusted input. This makes it possible for unauthenticated attackers to inject a PHP Object. No known POP chain is present in the vulnerable software. 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.