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CVE-2021-4451

HIGH 7.2 CVSS 3.1
Published
October 16, 2024
Last modified
June 17, 2026
NVD status
Analyzed
Reported by
security@wordfence.com
Weakness
CWE-502
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Description

The NinjaFirewall plugin for WordPress is vulnerable to Authenticated PHAR Deserialization in versions up to, and including, 4.3.3. This allows authenticated attackers to perform phar deserialization on the server. This deserialization can allow other plugin or theme exploits if vulnerable software is present (WordPress, and NinjaFirewall).

Affected WordPress components

  • NinjaFirewall (WP Edition) – Advanced Security Plugin and Firewall Plugin · ninjafirewall
    Confirmed match Active
    Up to and including 4.3.3
    View on WordPress.org

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • nintechnet NinjaFirewall (WP Edition) – Advanced Security Plugin and Firewall — Before 4.3.4
  • ninjatechnologiesnetwork ninja_firewall — Before 4.3.4
  • nintechnet ninjafirewall — Up to and including 4.3.3

References

  • blog.nintechnet.com https://blog.nintechnet.com/security-issue-fixed-in-ninjafirewall-wp-edition/ Patch
  • www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/1a1fc6c9-50cd-40fd-a777-9eed98aab797?source=cve Third Party Advisory
  • nvd.nist.gov Official NVD record