{
 "id": "WPSEC-2026-1775",
 "url": "https://wpsec.com/vuln/WPSEC-2026-1775/",
 "json_url": "https://wpsec.com/vuln/WPSEC-2026-1775/advisory.json",
 "markdown_url": "https://wpsec.com/vuln/WPSEC-2026-1775/index.md",
 "title": "Masteriyo LMS – LMS Course Builder, Quizzes & Certificates <= 3.4.3 - Unauthenticated Authentication Bypass via Webhook Action Endpoint",
 "description": "The Masteriyo LMS plugin for WordPress is vulnerable to Authentication Bypass via the webhooks/action REST endpoint in versions 2.19.0 through 3.4.3, due to the masteriyo_webhook_action_permission_callback() function looking up an instructor by the supplied token without rejecting an empty token, so the user query drops its meta value condition and matches any instructor holding a webhook token. This makes it possible for unauthenticated attackers to run non-privileged webhook actions, such as creating student accounts, enrolling or unenrolling users, completing lessons or courses, and resetting course progress, on courses owned by an instructor who has generated a webhook token.",
 "plugin": {
  "slug": "learning-management-system",
  "name": "Masteriyo LMS – LMS Course Builder, Quizzes & Certificates",
  "full_name": "Masteriyo LMS – LMS Course Builder, Quizzes & Certificates",
  "wordpress_org": "https://wordpress.org/plugins/learning-management-system/",
  "advisories_url": "https://wpsec.com/vuln/plugin/learning-management-system/",
  "attacksurface": "https://attacksurface.wpsec.com/plugin/learning-management-system"
 },
 "type": "AUTHBYPASS",
 "cwe": [
  "CWE-287"
 ],
 "cve": [],
 "cvss": {
  "version": "3.1",
  "score": 3.7,
  "vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N",
  "severity": "Low"
 },
 "affected": {
  "ranges": [
   {
    "from": "2.19.0",
    "from_inclusive": true,
    "to": "3.5.0",
    "to_inclusive": false
   }
  ],
  "text": [
   "from 2.19.0 before 3.5.0"
  ]
 },
 "introduced_in": "2.19.0",
 "fixed_in": "3.5.0",
 "remediation": "Update to 3.5.0 or later.",
 "fix_released": "2026-10-26T17:51:45+00:00",
 "published": "2026-10-27T18:42:07+00:00",
 "updated": "2026-10-27T13:39:56.396435+00:00",
 "also_published_as": null,
 "references": [
  "https://wpsec.com/vuln/WPSEC-2026-1775/",
  "https://plugins.svn.wordpress.org/learning-management-system/tags/3.5.0/",
  "https://wordpress.org/plugins/learning-management-system/"
 ],
 "attacksurface_url": "https://attacksurface.wpsec.com/plugin/learning-management-system",
 "source": "WPSec",
 "license": {
  "name": "CC BY 4.0",
  "url": "https://creativecommons.org/licenses/by/4.0/"
 },
 "usage": {
  "plugin": "Low",
  "affected_versions": "None seen",
  "as_of": "2026-10-27"
 }
}