CVE•Published 2023-06-07•Modified 2026-04-08•1 article on news•5 live references•NVD data

CVE-2021-4356Najeebmedia · Frontend_file_manager_plugin

Vulnerability data via NVD (ingested)

CVSS v3.1

9.0

CRITICAL

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

EPSS percentile

Exploit Prediction Scoring System · top 27% of all CVEs

Weaknesses (CWE)

CWE-862Missing Authorization

Description

The Frontend File Manager plugin for WordPress is vulnerable to Unauthenticated Arbitrary File Download in versions up to, and including, 18.2. This is due to lacking authentication protections, capability checks, and sanitization, all on the wpfm_file_meta_update AJAX action. This makes it possible for unauthenticated attackers to download arbitrary files on the site, potentially leading to site takeover.

Timeline

Published 2023-06-07

Modified 2026-04-08

External references

NVD MITRE Exploit-DB trickest/cve VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2021-4356

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · WP plugin path

http.html:"/wp-content/plugins/frontend-file-manager-plugin/"

Matches any site loading the "frontend-file-manager-plugin" plugin — doesn't rely on Shodan's vuln tag.

Shodan · product

product:"Najeebmedia Frontend File Manager Plugin"

All exposed Najeebmedia Frontend File Manager Plugin instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Frontend File Manager Plugin"

HTTP body or banner mentions "Frontend File Manager Plugin" — catches deploys Shodan didn't identify as a product.