Shield Security <= 21.0.8 - Cross-Site Request Forgery to SQL Injection

Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
CVE CVE-2026-0722
CVSS Medium (6.5)
Publicly Published February 18, 2026
Last Updated February 19, 2026
Researcher Dmitrii Ignatyev
Description

The Shield Security plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 21.0.8. This is due to the plugin allowing nonce verification to be bypassed via user-supplied parameter in the 'isNonceVerifyRequired' function. This makes it possible for unauthenticated attackers to execute SQL injection attacks, extracting sensitive information from the database, via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

References

1 affected software package

Software Type Plugin
Software Slug wp-simple-firewall (view on wordpress.org)
Patched? Yes
Affected Version
  • <= 21.0.8
Patched Version
  • 21.0.10
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