PT-2021-23594 · WordPress · Wordpress Popular Posts

Jerome Bruandet · Published 2021-11-17 · Updated 2024-09-16 · CVE-2021-42362

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions WordPress Popular Posts versions up to and including 5.3.2

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

Recommendations For versions up to and including 5.3.2, update to a version that includes the fix for the arbitrary file upload vulnerability. As a temporary workaround, consider restricting access to the ~/src/Image.php file to minimize the risk of exploitation. Additionally, restrict contributor level access and above to prevent attackers from uploading malicious files.

Exploit

Fix

RCE

Unrestricted File Upload

Weakness Enumeration

CWE-434

Related Identifiers

CVE-2021-42362

Affected Products

Wordpress Popular Posts

References · 15

• 🔥 https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/multi/http/wp_popular_posts_rce.rb · Exploit
• 🔥 https://exploit-db.com/exploits/50129 · Exploit
• 🔥 http://packetstormsecurity.com/files/165376/WordPress-Popular-Posts-5.3.2-Remote-Code-Execution.html · Exploit
• 🔥 https://blog.nintechnet.com/improper-input-validation-fixed-in-wordpress-popular-posts-plugin · Exploit
• https://github.com/cabrerahector/wordpress-popular-posts/commit/d9b274cf6812eb446e4103cb18f69897ec6fe601 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2021-42362 · Security Note
• https://plugins.trac.wordpress.org/changeset/2542638/wordpress-popular-posts/trunk/src/Image.php · Patch
• https://osv.dev/vulnerability/CVE-2021-42362 · Vendor Advisory
• https://wpscan.com/vulnerability/bd4f157c-a3d7-4535-a587-0102ba4e3009 · Note
• https://t.me/cvenotify/94800 · Telegram Post
• https://t.me/cibsecurity/32531 · Telegram Post
• https://t.me/cvenotify/24737 · Telegram Post
• https://t.me/cvenotify/24659 · Telegram Post
• https://wordfence.com/vulnerability-advisories/#CVE-2021-42362 · Note
• https://t.me/cvenotify/61034 · Telegram Post