HOMEVULNERABILITIESCVE-2021-4350
MEDIUM

CVE-2021-4350

CWE-862Published: June 7, 2023· Updated: Jun 17, 2026

5.3
CVSS v3.1

Official Description

The Frontend File Manager plugin for WordPress is vulnerable to Unauthenticated HTML Injection in versions up to, and including, 18.2. This is due to lacking authentication protections on the wpfm_send_file_in_email AJAX action. This makes it possible for unauthenticated attackers to send emails using the site with a custom subject, recipient email, and body with unsanitized HTML content. This effectively lets the attacker use the site as a spam relay.

NVD Source

Technical Analysis

CVE-2021-4350 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Affected Vendors & Products

najeebmedia1 product(s)
frontend file manager plugin
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://www.wordfence.com/threat-intel/vulnerabilities/id/49150180-9de0-4318-b21b-779daaeb7a52?source=cve
ADVISORYhttps://www.wordfence.com/threat-intel/vulnerabilities/id/49150180-9de0-4318-b21b-779daaeb7a52?source=cve

All References (4)

→
https://blog.nintechnet.com/wordpress-frontend-file-manager-plugin-fixed-multiple-critical-vulnerabilities/Exploit
→
https://www.wordfence.com/threat-intel/vulnerabilities/id/49150180-9de0-4318-b21b-779daaeb7a52?source=cveThird Party Advisory
→
https://blog.nintechnet.com/wordpress-frontend-file-manager-plugin-fixed-multiple-critical-vulnerabilities/Exploit
→
https://www.wordfence.com/threat-intel/vulnerabilities/id/49150180-9de0-4318-b21b-779daaeb7a52?source=cveThird Party Advisory

Quick Facts

CVE IDCVE-2021-4350
CVSS Score5.3 / 10
SeverityMEDIUM
WeaknessCWE-862
CISA KEVNo
Affected1 vendor(s)
PublishedJun 7, 2023

Related CVEs (CWE-862)

CVE-2024-6071
10.0
CVE-2025-22609
10.0
CVE-2025-45854
10.0
CVE-2025-30416
10.0
CVE-2026-34976
10.0
CVE-2026-0092
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-4350 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
← All Vulnerabilities·Search for CVE-2021-4350·NVD