CVE-2021-4350 Vulnerability Analysis & Exploit Details

CVE-2021-4350
Vulnerability Scoring

7.2
/10
Very High Risk

Highly exploitable, CVE-2021-4350 poses a critical security risk that could lead to severe breaches.

Attack Complexity Details

  • Attack Complexity: Low
    Exploits can be performed without significant complexity or special conditions.
  • Attack Vector: Network
    Vulnerability is exploitable over a network without physical access.
  • Privileges Required: None
    No privileges are required for exploitation.
  • Scope: Changed
    Successful exploitation can impact components beyond the vulnerable component.
  • User Interaction: None
    No user interaction is necessary for exploitation.

CVE-2021-4350 Details

Status: Modified

Last updated: 🕡 21 Nov 2024, 06:37 UTC
Originally published on: 🕑 07 Jun 2023, 02:15 UTC

Time between publication and last update: 533 days

CVSS Release: version 3

CVSS3 Source

security@wordfence.com

CVSS3 Type

Secondary

CVSS3 Vector

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

CVE-2021-4350 Vulnerability Summary

CVE-2021-4350: 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.

Assessing the Risk of CVE-2021-4350

Access Complexity Graph

The exploitability of CVE-2021-4350 depends on two key factors: attack complexity (the level of effort required to execute an exploit) and privileges required (the access level an attacker needs).

Exploitability Analysis for CVE-2021-4350

With low attack complexity and no required privileges, CVE-2021-4350 is an easy target for cybercriminals. Organizations should prioritize immediate mitigation measures to prevent unauthorized access and data breaches.

Understanding AC and PR

A lower complexity and fewer privilege requirements make exploitation easier. Security teams should evaluate these aspects to determine the urgency of mitigation strategies, such as patch management and access control policies.

Attack Complexity (AC) measures the difficulty in executing an exploit. A high AC means that specific conditions must be met, making an attack more challenging, while a low AC means the vulnerability can be exploited with minimal effort.

Privileges Required (PR) determine the level of system access necessary for an attack. Vulnerabilities requiring no privileges are more accessible to attackers, whereas high privilege requirements limit exploitation to authorized users with elevated access.

CVSS Score Breakdown Chart

Above is the CVSS Sub-score Breakdown for CVE-2021-4350, illustrating how Base, Impact, and Exploitability factors combine to form the overall severity rating. A higher sub-score typically indicates a more severe or easier-to-exploit vulnerability.

CIA Impact Analysis

Below is the Impact Analysis for CVE-2021-4350, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

  • Confidentiality: None
    CVE-2021-4350 has no significant impact on data confidentiality.
  • Integrity: Low
    Exploiting CVE-2021-4350 may cause minor changes to data without severely impacting its accuracy.
  • Availability: Low
    CVE-2021-4350 may slightly degrade system performance without fully affecting service availability.

Exploit Prediction Scoring System (EPSS)

The EPSS score estimates the probability that this vulnerability will be exploited in the near future.

EPSS Score: 0.105% (probability of exploit)

EPSS Percentile: 45.06% (lower percentile = lower relative risk)
This vulnerability is less risky than approximately 54.94% of others.

CVE-2021-4350 References

External References

CWE Common Weakness Enumeration

CWE-862

CAPEC Common Attack Pattern Enumeration and Classification

  • Exploitation of Thunderbolt Protection Flaws CAPEC-665 An adversary leverages a firmware weakness within the Thunderbolt protocol, on a computing device to manipulate Thunderbolt controller firmware in order to exploit vulnerabilities in the implementation of authorization and verification schemes within Thunderbolt protection mechanisms. Upon gaining physical access to a target device, the adversary conducts high-level firmware manipulation of the victim Thunderbolt controller SPI (Serial Peripheral Interface) flash, through the use of a SPI Programing device and an external Thunderbolt device, typically as the target device is booting up. If successful, this allows the adversary to modify memory, subvert authentication mechanisms, spoof identities and content, and extract data and memory from the target device. Currently 7 major vulnerabilities exist within Thunderbolt protocol with 9 attack vectors as noted in the Execution Flow.

Vulnerable Configurations

  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:-:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:-:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:1.0:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:1.0:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:1.1:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:1.1:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:1.2:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:1.2:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:1.3:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:1.3:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:1.4:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:1.4:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:1.5:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:1.5:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:1.6:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:1.6:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:1.7:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:1.7:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:1.8:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:1.8:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:2.0:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:2.0:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:2.1:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:2.1:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:3.0:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:3.0:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:3.1:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:3.1:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:3.2:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:3.2:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:3.3:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:3.3:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:3.4:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:3.4:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:3.5:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:3.5:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:3.6:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:3.6:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:3.7:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:3.7:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:3.8:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:3.8:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:3.9:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:3.9:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:4.0:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:4.0:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:4.1:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:4.1:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:5.0:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:5.0:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:5.1:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:5.1:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:5.2:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:5.2:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:13.0:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:13.0:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:13.1:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:13.1:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:13.2:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:13.2:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:13.3:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:13.3:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:13.4:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:13.4:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:13.5:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:13.5:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:13.6:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:13.6:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:13.7:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:13.7:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:13.8:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:13.8:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:13.9:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:13.9:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:14.0:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:14.0:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:14.1:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:14.1:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:14.2:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:14.2:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:14.3:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:14.3:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:14.4:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:14.4:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:14.5:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:14.5:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:14.6:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:14.6:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:14.7:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:14.7:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:14.8:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:14.8:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:14.9:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:14.9:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:15.0:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:15.0:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:15.1:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:15.1:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:15.2:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:15.2:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:15.3:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:15.3:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:15.4:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:15.4:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:15.5:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:15.5:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:15.6:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:15.6:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:15.7:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:15.7:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:15.8:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:15.8:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:15.9:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:15.9:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:16.0:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:16.0:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:17.0:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:17.0:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:17.1:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:17.1:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:18.0:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:18.0:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:18.1:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:18.1:*:*:*:*:wordpress:*:*
  • cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:18.2:*:*:*:*:wordpress:*:*
    cpe:2.3:a:najeebmedia:frontend_file_manager_plugin:18.2:*:*:*:*:wordpress:*:*

Protect Your Infrastructure against CVE-2021-4350: Combat Critical CVE Threats

Stay updated with real-time CVE vulnerabilities and take action to secure your systems. Enhance your cybersecurity posture with the latest threat intelligence and mitigation techniques. Develop the skills necessary to defend against CVEs and secure critical infrastructures. Join the top cybersecurity professionals safeguarding today's infrastructures.

Other 5 Recently Published CVEs Vulnerabilities

  • CVE-2025-3803 – A vulnerability was found in Tenda W12 and i24 3.0.0.4(2887)/3.0.0.5(3644). It has been rated as critical. This issue affects the function cgiSysSc...
  • CVE-2025-3802 – A vulnerability was found in Tenda W12 and i24 3.0.0.4(2887)/3.0.0.5(3644). It has been declared as critical. This vulnerability affects the functi...
  • CVE-2025-3801 – A vulnerability was found in songquanpeng one-api up to 0.6.10. It has been classified as problematic. This affects an unknown part of the componen...
  • CVE-2025-3800 – A vulnerability has been found in WCMS 11 and classified as critical. Affected by this vulnerability is an unknown functionality of the file app/co...
  • CVE-2025-3799 – A vulnerability, which was classified as critical, was found in WCMS 11. Affected is an unknown function of the file app/controllers/AnonymousContr...