{
 "id": "WPSEC-2026-0923",
 "url": "https://wpsec.com/vuln/WPSEC-2026-0923/",
 "json_url": "https://wpsec.com/vuln/WPSEC-2026-0923/advisory.json",
 "markdown_url": "https://wpsec.com/vuln/WPSEC-2026-0923/index.md",
 "title": "Broken Link Checker <= 2.4.14.1 - Unauthenticated Authentication Bypass to Scan Report Recipient Removal",
 "description": "The Broken Link Checker plugin for WordPress is vulnerable to Authentication Bypass via the recipient activation webhook in all versions up to, and including, 2.4.14.1, due to the get_recipient_by_key() function matching registered-user recipients on the MD5 hash of their email address alone, without checking the stored random recipient key. This makes it possible for unauthenticated attackers who know a registered recipient's email address to forge a cancellation token and remove that user from the scan report recipients.",
 "plugin": {
  "slug": "broken-link-checker",
  "name": "Broken Link Checker",
  "full_name": "Broken Link Checker",
  "wordpress_org": "https://wordpress.org/plugins/broken-link-checker/",
  "advisories_url": "https://wpsec.com/vuln/plugin/broken-link-checker/",
  "attacksurface": "https://attacksurface.wpsec.com/plugin/broken-link-checker"
 },
 "type": "AUTHBYPASS",
 "cwe": [
  "CWE-287"
 ],
 "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": "2.4.15",
    "to_inclusive": false
   }
  ],
  "text": [
   "all versions before 2.4.15"
  ]
 },
 "introduced_in": null,
 "fixed_in": "2.4.15",
 "remediation": "Update to 2.4.15 or later.",
 "fix_released": "2026-10-12T07:25:12+00:00",
 "published": "2026-10-14T13:49:25+00:00",
 "updated": "2026-10-14T13:19:42.586398+00:00",
 "also_published_as": null,
 "references": [
  "https://wpsec.com/vuln/WPSEC-2026-0923/",
  "https://plugins.svn.wordpress.org/broken-link-checker/tags/2.4.15/",
  "https://wordpress.org/plugins/broken-link-checker/"
 ],
 "attacksurface_url": "https://attacksurface.wpsec.com/plugin/broken-link-checker",
 "source": "WPSec",
 "license": {
  "name": "CC BY 4.0",
  "url": "https://creativecommons.org/licenses/by/4.0/"
 },
 "usage": {
  "plugin": "Low",
  "affected_versions": "Low",
  "as_of": "2026-10-14"
 }
}