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CVE-2021-42362

HIGH 8.8 CVSS 3.1
Published
November 17, 2021
Last modified
June 17, 2026
NVD status
Modified
Reported by
security@wordfence.com
Weakness
CWE-434
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Description

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.

Affected WordPress components

  • WP Popular Posts Plugin · wordpress-popular-posts
    Confirmed match Active
    From 0.0 (including) to 5.3.2 (including)
    View on WordPress.org

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • WordPress Popular Posts WordPress Popular Posts — From 0.0 (including) to 5.3.2 (including)
  • wordpress_popular_posts_project wordpress_popular_posts — Up to and including 5.3.2

References

  • packetstormsecurity.com http://packetstormsecurity.com/files/165376/WordPress-Popular-Posts-5.3.2-Remote-Code-Execution.html Exploit, Third Party Advisory, VDB Entry
  • blog.nintechnet.com https://blog.nintechnet.com/improper-input-validation-fixed-in-wordpress-popular-posts-plugin/ Exploit, Third Party Advisory
  • github.com https://github.com/cabrerahector/wordpress-popular-posts/commit/d9b274cf6812eb446e4103cb18f69897ec6fe601
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/changeset/2542638/wordpress-popular-posts/trunk/src/Image.php Patch, Third Party Advisory
  • wpscan.com https://wpscan.com/vulnerability/bd4f157c-a3d7-4535-a587-0102ba4e3009 Third Party Advisory
  • www.wordfence.com https://www.wordfence.com/vulnerability-advisories/#CVE-2021-42362 Third Party Advisory
  • nvd.nist.gov Official NVD record