---
id: CVE-2026-81754
title: >-
  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 inp…
summary: >-
  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 inp…
severity: high
cvss: 7.2
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
vendor: fernandot
product: 'Vigilant – 100% Free Security Suite: Firewall, 2FA, Login, Headers, Scanner…'
affected:
  - >-
    vigilant_100_free_security_suite_firewall_2fa_login_headers_scanner <=
    2.10.2
published: '2026-09-11'
updated: '2026-09-11'
sourceUpdated: '2026-09-11T15:17:05.270'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-81754'
references:
  - url: >-
      https://plugins.trac.wordpress.org/browser/vigilante/tags/2.9.5/assets/js/admin.js#L1996
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/vigilante/tags/2.9.5/assets/js/admin.js#L2778
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/vigilante/tags/2.9.5/includes/class-database.php#L448
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/vigilante/tags/2.9.5/includes/class-database.php#L639
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/vigilante/tags/2.9.5/includes/class-login-security.php#L899
    label: security@wordfence.com
  - url: >-
      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=
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/c483cdc5-56e4-4ee7-a782-0505816728ab?source=cve
    label: security@wordfence.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-11T14:10:47.820823Z'
epss: 0.00419
epssPercentile: 0.33527
ingestedAt: '2026-09-11T16:45:47.859Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.