{
 "id": "WPSEC-2026-2253",
 "url": "https://wpsec.com/vuln/WPSEC-2026-2253/",
 "json_url": "https://wpsec.com/vuln/WPSEC-2026-2253/advisory.json",
 "markdown_url": "https://wpsec.com/vuln/WPSEC-2026-2253/index.md",
 "title": "ClickCease Click Fraud Protection <= 3.3.0 - Unauthenticated Missing Authorization to Server-Side Protection Bypass via validate_clickcease_response AJAX Action",
 "description": "The ClickCease Click Fraud Protection plugin for WordPress is vulnerable to unauthorized modification of data via the public validate_clickcease_response AJAX action in all versions up to, and including, 3.3.0. This is due to the RTI_Service::validateRTIClient() function updating the 'cheq_invalid_secret' site option based on the result of decrypting an attacker-supplied 'cheq_hash' value, while the required nonce is exposed to every front-end visitor. This makes it possible for unauthenticated attackers to send a malformed hash that sets the flag and disables the plugin's server-side bot and click-fraud validation site-wide.",
 "plugin": {
  "slug": "clickcease-click-fraud-protection",
  "name": "ClickCease Click Fraud Protection",
  "full_name": "ClickCease Click Fraud Protection",
  "wordpress_org": "https://wordpress.org/plugins/clickcease-click-fraud-protection/",
  "advisories_url": "https://wpsec.com/vuln/plugin/clickcease-click-fraud-protection/",
  "attacksurface": "https://attacksurface.wpsec.com/plugin/clickcease-click-fraud-protection"
 },
 "type": "NO AUTHORISATION",
 "cwe": [
  "CWE-862"
 ],
 "cve": [],
 "cvss": {
  "version": "3.1",
  "score": 5.3,
  "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
  "severity": "Medium"
 },
 "affected": {
  "ranges": [
   {
    "from": null,
    "from_inclusive": true,
    "to": "3.3.1",
    "to_inclusive": false
   }
  ],
  "text": [
   "all versions before 3.3.1"
  ]
 },
 "introduced_in": null,
 "fixed_in": "3.3.1",
 "remediation": "Update to 3.3.1 or later.",
 "fix_released": "2026-11-01T13:02:50+00:00",
 "published": "2026-11-03T14:48:33+00:00",
 "updated": "2026-11-03T13:21:41.606923+00:00",
 "also_published_as": null,
 "references": [
  "https://wpsec.com/vuln/WPSEC-2026-2253/",
  "https://plugins.svn.wordpress.org/clickcease-click-fraud-protection/tags/3.3.1/",
  "https://wordpress.org/plugins/clickcease-click-fraud-protection/"
 ],
 "attacksurface_url": "https://attacksurface.wpsec.com/plugin/clickcease-click-fraud-protection",
 "source": "WPSec",
 "license": {
  "name": "CC BY 4.0",
  "url": "https://creativecommons.org/licenses/by/4.0/"
 },
 "usage": {
  "plugin": "Low",
  "affected_versions": "Low",
  "as_of": "2026-11-03"
 }
}