{
 "id": "WPSEC-2026-1816",
 "url": "https://wpsec.com/vuln/WPSEC-2026-1816/",
 "json_url": "https://wpsec.com/vuln/WPSEC-2026-1816/advisory.json",
 "markdown_url": "https://wpsec.com/vuln/WPSEC-2026-1816/index.md",
 "title": "Security & Malware scan by CleanTalk <= 2.190 - Unauthenticated Authentication Bypass via Two-Factor Authentication Code Brute Force",
 "description": "The Security Plugin, Firewall & Malware Scanner with Auto Removal plugin for WordPress is vulnerable to Authentication Bypass via the two-factor authentication code check on the login form in all versions up to, and including, 2.190, due to the spbc_2fa__authenticate() function logging in any user named in the 'log' parameter when the submitted 'spbc_2fa' code matches, without checking that the password step was completed for that request. Per-user attempts were not limited (only a per-IP rate limit applied), codes were compared loosely with no replay protection, and secrets and e-mail codes were generated with rand(). This makes it possible for unauthenticated attackers who know the username of an account that uses an authenticator app for two-factor authentication to brute-force or replay the 6-digit code and log in as that user without the password, when the plugin's 2FA feature is enabled.",
 "plugin": {
  "slug": "security-malware-firewall",
  "name": "Security & Malware scan by CleanTalk",
  "full_name": "Security Plugin, Firewall & Malware Scanner with Auto Removal",
  "wordpress_org": "https://wordpress.org/plugins/security-malware-firewall/",
  "advisories_url": "https://wpsec.com/vuln/plugin/security-malware-firewall/",
  "attacksurface": "https://attacksurface.wpsec.com/plugin/security-malware-firewall"
 },
 "type": "AUTHBYPASS",
 "cwe": [
  "CWE-287"
 ],
 "cve": [],
 "cvss": {
  "version": "3.1",
  "score": 8.1,
  "vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "severity": "High"
 },
 "affected": {
  "ranges": [
   {
    "from": null,
    "from_inclusive": true,
    "to": "2.191",
    "to_inclusive": false
   }
  ],
  "text": [
   "all versions before 2.191"
  ]
 },
 "introduced_in": null,
 "fixed_in": "2.191",
 "remediation": "Update to 2.191 or later.",
 "fix_released": "2026-10-27T07:44:45+00:00",
 "published": "2026-10-28T07:47:27+00:00",
 "updated": "2026-10-27T13:38:33.763283+00:00",
 "also_published_as": null,
 "references": [
  "https://wpsec.com/vuln/WPSEC-2026-1816/",
  "https://plugins.svn.wordpress.org/security-malware-firewall/tags/2.191/",
  "https://wordpress.org/plugins/security-malware-firewall/"
 ],
 "attacksurface_url": "https://attacksurface.wpsec.com/plugin/security-malware-firewall",
 "source": "WPSec",
 "license": {
  "name": "CC BY 4.0",
  "url": "https://creativecommons.org/licenses/by/4.0/"
 },
 "usage": {
  "plugin": "Low",
  "affected_versions": "Low",
  "as_of": "2026-10-28"
 }
}