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CVE-2026-81754

HIGH 7.2 CVSS 3.1
Published
September 11, 2026
Last modified
September 11, 2026
NVD status
Deferred
Reported by
security@wordfence.com
Weakness
CWE-79
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Description

The Vigilant – 100% Free Security Suite: Firewall, 2FA, Login, Headers, Scanner… plugin for WordPress is vulnerable to Stored Cross-Site Scripting via User-Agent Header in all versions up to, and including, 2.10.2 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The malicious payload is delivered passively by any unauthenticated visitor who triggers a failed login attempt with a crafted User-Agent header, requiring no further interaction from the attacker once stored.

Affected WordPress components

  • Vigilant – 100% Free Security Suite: Firewall, 2FA, Login, Headers, Scanner… Plugin · vigilante
    Confirmed match Active
    Up to and including 2.10.2
    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

  • fernandot Vigilant – 100% Free Security Suite: Firewall, 2FA, Login, Headers, Scanner… — Up to and including 2.10.2

References

  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/vigilante/tags/2.9.5/assets/js/admin.js#L1996
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/vigilante/tags/2.9.5/assets/js/admin.js#L2778
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/vigilante/tags/2.9.5/includes/class-database.php#L448
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/vigilante/tags/2.9.5/includes/class-database.php#L639
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/vigilante/tags/2.9.5/includes/class-login-security.php#L899
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=3669625%40vigilante%2Ftrunk%2Fassets%2Fjs%2Fadmin.js&old=3667821%40vigilante%2Ftrunk%2Fassets%2Fjs%2Fadmin.js&sfp_email=&sfph_mail=
  • www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/c483cdc5-56e4-4ee7-a782-0505816728ab?source=cve
  • nvd.nist.gov Official NVD record