CVE-2021-42362

The WordPress Popular Posts WordPress plugin is vulnerable to arbitrary file uploads due to insufficient input file type validation found in the ~/src/Image.php file which makes it possible for attackers with contributor level access and above to upload malicious files that can be used to obtain remote code execution, in versions up to and including 5.3.2.

• CWE-434

• http://packetstormsecurity.com/files/165376/WordPress-Popular-Posts-5.3.2-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
• https://blog.nintechnet.com/improper-input-validation-fixed-in-wordpress-popular-posts-plugin/Exploit, Third Party Advisory
• https://github.com/cabrerahector/wordpress-popular-posts/commit/d9b274cf6812eb446e4103cb18f69897ec6fe601
• https://plugins.trac.wordpress.org/changeset/2542638/wordpress-popular-posts/trunk/src/Image.phpPatch, Third Party Advisory
• https://wpscan.com/vulnerability/bd4f157c-a3d7-4535-a587-0102ba4e3009Third Party Advisory
• https://www.wordfence.com/vulnerability-advisories/#CVE-2021-42362Third Party Advisory
• http://packetstormsecurity.com/files/165376/WordPress-Popular-Posts-5.3.2-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
• https://blog.nintechnet.com/improper-input-validation-fixed-in-wordpress-popular-posts-plugin/Exploit, Third Party Advisory
• https://github.com/cabrerahector/wordpress-popular-posts/commit/d9b274cf6812eb446e4103cb18f69897ec6fe601
• https://plugins.trac.wordpress.org/changeset/2542638/wordpress-popular-posts/trunk/src/Image.phpPatch, Third Party Advisory
• https://wpscan.com/vulnerability/bd4f157c-a3d7-4535-a587-0102ba4e3009Third Party Advisory
• https://www.wordfence.com/vulnerability-advisories/#CVE-2021-42362Third Party Advisory

Published

Nov 17, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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