{
 "id": "WPSEC-2026-2633",
 "url": "https://wpsec.com/vuln/WPSEC-2026-2633/",
 "json_url": "https://wpsec.com/vuln/WPSEC-2026-2633/advisory.json",
 "markdown_url": "https://wpsec.com/vuln/WPSEC-2026-2633/index.md",
 "title": "Limit Login Attempts Reloaded <= 3.4.0 - Unauthenticated Two-Factor Authentication Bypass via Failed Two-Factor Handshake",
 "description": "The Limit Login Attempts Security plugin for WordPress is vulnerable to Two-Factor Authentication Bypass via the two-factor login handshake in all versions up to, and including, 3.4.0, due to the two-factor flow failing open: whenever the handshake with the two-factor service did not succeed (handshake rate limit reached, repeated attempt in the same request, missing provider, a request payload that could not be encoded, or a rejected or unusable response), the check returned without an error and WordPress completed a password-only login. The handshake rate limit can be reached on purpose by repeating the login, and the raw X-Forwarded-For header was placed unsanitized into the handshake payload, so invalid UTF-8 caused JSON encoding to fail. This makes it possible for unauthenticated attackers who know the password of a 2FA-protected account to deliberately make the handshake fail and log in without the second factor. Exploitation requires two-factor authentication to be enabled for the targeted user's role and the attacker to know the account password.",
 "plugin": {
  "slug": "limit-login-attempts-reloaded",
  "name": "Limit Login Attempts Reloaded",
  "full_name": "Limit Login Attempts Security – Brute Force Protection, 2FA, Firewall & Login Security",
  "wordpress_org": "https://wordpress.org/plugins/limit-login-attempts-reloaded/",
  "advisories_url": "https://wpsec.com/vuln/plugin/limit-login-attempts-reloaded/",
  "attacksurface": "https://attacksurface.wpsec.com/plugin/limit-login-attempts-reloaded"
 },
 "type": "AUTHBYPASS",
 "cwe": [
  "CWE-636"
 ],
 "cve": [],
 "cvss": {
  "version": "3.1",
  "score": 7.4,
  "vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
  "severity": "High"
 },
 "affected": {
  "ranges": [
   {
    "from": "3.0.0",
    "from_inclusive": true,
    "to": "3.4.1",
    "to_inclusive": false
   }
  ],
  "text": [
   "from 3.0.0 before 3.4.1"
  ]
 },
 "introduced_in": "3.0.0",
 "fixed_in": "3.4.1",
 "remediation": "Update to 3.4.1 or later.",
 "fix_released": "2026-11-05T07:22:05+00:00",
 "published": "2026-11-06T07:49:05+00:00",
 "updated": "2026-11-05T09:51:15.110845+00:00",
 "also_published_as": null,
 "references": [
  "https://wpsec.com/vuln/WPSEC-2026-2633/",
  "https://plugins.svn.wordpress.org/limit-login-attempts-reloaded/tags/3.4.1/",
  "https://wordpress.org/plugins/limit-login-attempts-reloaded/"
 ],
 "attacksurface_url": "https://attacksurface.wpsec.com/plugin/limit-login-attempts-reloaded",
 "source": "WPSec",
 "license": {
  "name": "CC BY 4.0",
  "url": "https://creativecommons.org/licenses/by/4.0/"
 },
 "usage": {
  "plugin": "Medium",
  "affected_versions": "Medium",
  "as_of": "2026-11-06"
 }
}