PT-2023-12465 · WordPress · Frontend File Manager

Jerome Bruandet · Published 2023-06-07 · Updated 2026-04-08 · CVE-2021-4356

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions Frontend File Manager plugin for WordPress versions up to and including 18.2

Description The issue is related to a lack of authentication protections, capability checks, and sanitization in the wpfm file meta update AJAX action. This allows unauthenticated attackers to download arbitrary files on the site, potentially leading to site takeover.

Recommendations For versions up to and including 18.2, update to a version that includes the necessary authentication protections, capability checks, and sanitization for the wpfm file meta update AJAX action to prevent arbitrary file downloads.

Exploit

Fix

Missing Authorization

Weakness Enumeration

CWE-862

Related Identifiers

CVE-2021-4356

Affected Products

Frontend File Manager

References · 6

• 🔥 https://blog.nintechnet.com/wordpress-frontend-file-manager-plugin-fixed-multiple-critical-vulnerabilities · Exploit
• https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=2554359%40nmedia-user-file-uploader&new=2554359%40nmedia-user-file-uploader&sfp_email=&sfph_mail= · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2021-4356 · Security Note
• https://osv.dev/vulnerability/CVE-2021-4356 · Vendor Advisory
• https://twitter.com/0dayPublishing/status/2041937641273278581 · Twitter Post
• https://wordfence.com/threat-intel/vulnerabilities/id/79e2011c-5e4d-4d02-831f-6b4dcfcaa51e?source=cve · Note