Description
WordPress Plugin Newsletter Manager is prone to a vulnerability that lets remote attackers inject and execute arbitrary code because the application fails to sanitize user-supplied input before being passed to the unserialize() PHP function. Attackers can possibly exploit this issue to execute arbitrary PHP code within the context of the affected webserver process. WordPress Plugin Newsletter Manager version 1.5.1 is vulnerable; prior versions may also be affected.
Remediation
Disable the plugin until a fix is available
References
Related Vulnerabilities
Perl Permissions, Privileges, and Access Controls Vulnerability (CVE-2011-1487)
WordPress 5.1.x Multiple Vulnerabilities (5.1 - 5.1.16)
WordPress Plugin AdRotate-Ad manager & AdSense Ads SQL Injection (3.9.4)
ownCloud Improper Authentication Vulnerability (CVE-2020-10254)
Oracle Application Server CVE-2006-0288 Vulnerability (CVE-2006-0288)