Description
WordPress Plugin WordPress Popular Posts is prone to multiple vulnerabilities, including cross-site scripting and remote code execution vulnerabilities. Exploiting these issues could allow an attacker to execute arbitrary script code in the browser of an unsuspecting user in the context of the affected site, allowing the attacker to steal cookie-based authentication credentials, to execute arbitrary code with the privileges of the user running the application, to compromise the application or the underlying database, to access or modify data or to compromise a vulnerable system. WordPress Plugin WordPress Popular Posts version 5.3.2 is vulnerable; prior versions may also be affected.
Remediation
Update to plugin version 5.3.3 or latest
References
https://blog.nintechnet.com/improper-input-validation-fixed-in-wordpress-popular-posts-plugin/
https://jvn.jp/en/jp/JVN63066062/index.html
https://www.exploit-db.com/exploits/50129
https://packetstormsecurity.com/files/163509/WordPress-Popular-Posts-5.3.2-Shell-Upload.html
https://www.wordfence.com/vulnerability-advisories/#CVE-2021-42362
https://github.com/cabrerahector/wordpress-popular-posts/blob/master/changelog.md