Advanced Custom Fields beofre 6.1.6 is susceptible to cross-site scripting via the post_status parameter due to insufficient input sanitization and output escaping. An attacker can inject arbitrary script in the browser of an unsuspecting user in the context of the affected site. This can allow the attacker to steal cookie-based authentication credentials and launch other attacks.
Successful exploitation of this vulnerability could allow an attacker to execute malicious scripts in the context of a victim's browser, potentially leading to session hijacking, defacement, or theft of sensitive information.
GET /wp-admin/edit.php?post_type=acf-post-type&post_status=%22style%3Danimation-name%3Arotation+onanimationstart%3Dalert%28document.domain%29%2F%2F HTTP/1.1