Description
WordPress Plugin Custom 404 Pro is prone to a cross-site scripting vulnerability because it fails to properly sanitize user-supplied input. An attacker may leverage this issue to execute arbitrary script code 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. WordPress Plugin Custom 404 Pro version 3.2.7 is vulnerable; prior versions may also be affected.
Remediation
Update to plugin version 3.2.8 or latest
References
Related Vulnerabilities
Jenkins Exposure of Sensitive Information to an Unauthorized Actor Vulnerability (CVE-2014-2064)
WordPress Plugin Events Manager Extended Multiple HTML Injection Vulnerabilities (3.1.2)
WordPress Plugin Phoenix Media Rename Security Bypass (3.4.2)
Python Integer Overflow or Wraparound Vulnerability (CVE-2018-20406)