Deserialization of Untrusted Data
The Anti-Malware Security and Brute-Force Firewall WordPress plugin through 4.21.85 is prone to a PHP Object Injection vulnerability due to the unsafe use of unserialize() function. A potential attacker, authenticated as high privilege user could exploit this vulnerability by sending specially crafted requests to the web application containing malicious serialized input.
CWE-502 - Deserialization of Untrusted Data
Deserialization of untrusted data vulnerabilities enable an attacker to replace or manipulate a serialized object, replacing it with malicious data. When the object is deserialized at the victim's end the malicious data is able to compromise the victim’s system. The exploit can be devastating, its impact may range from privilege escalation, broken access control, or denial of service attacks to allowing unauthorized access to the application's internal code and logic which can compromise the entire system.