{
 "id": "WPSEC-2026-2276",
 "url": "https://wpsec.com/vuln/WPSEC-2026-2276/",
 "json_url": "https://wpsec.com/vuln/WPSEC-2026-2276/advisory.json",
 "markdown_url": "https://wpsec.com/vuln/WPSEC-2026-2276/index.md",
 "title": "WCFM Membership – WooCommerce Memberships for Multivendor Marketplace <= 2.12.0 - Authenticated (Vendor+) Missing Authorization to Membership Plan Change",
 "description": "The WCFM Membership – WooCommerce Memberships for Multivendor Marketplace plugin for WordPress is vulnerable to unauthorized modification of data via the wcfmvm_membership_change AJAX action in all versions up to, and including, 2.12.0, due to a capability check that accepts marketplace vendor roles for this administrator-only \"Change or Upgrade\" action and missing validation that the target plan is a published membership. This makes it possible for authenticated attackers with vendor-level access to move their own account onto any membership plan, including paid, disabled or unpublished plans, without paying for it.",
 "plugin": {
  "slug": "wc-multivendor-membership",
  "name": "WCFM Membership – WooCommerce Memberships for Multivendor Marketplace",
  "full_name": "WCFM Membership – WooCommerce Memberships for Multivendor Marketplace",
  "wordpress_org": "https://wordpress.org/plugins/wc-multivendor-membership/",
  "advisories_url": "https://wpsec.com/vuln/plugin/wc-multivendor-membership/",
  "attacksurface": "https://attacksurface.wpsec.com/plugin/wc-multivendor-membership"
 },
 "type": "NO AUTHORISATION",
 "cwe": [
  "CWE-862"
 ],
 "cve": [],
 "cvss": {
  "version": "3.1",
  "score": 4.3,
  "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
  "severity": "Medium"
 },
 "affected": {
  "ranges": [
   {
    "from": null,
    "from_inclusive": true,
    "to": "2.12.1",
    "to_inclusive": false
   }
  ],
  "text": [
   "all versions before 2.12.1"
  ]
 },
 "introduced_in": null,
 "fixed_in": "2.12.1",
 "remediation": "Update to 2.12.1 or later.",
 "fix_released": "2026-11-02T09:04:30+00:00",
 "published": "2026-11-03T14:48:33+00:00",
 "updated": "2026-11-03T13:22:46.928238+00:00",
 "also_published_as": null,
 "references": [
  "https://wpsec.com/vuln/WPSEC-2026-2276/",
  "https://plugins.svn.wordpress.org/wc-multivendor-membership/tags/2.12.1/",
  "https://wordpress.org/plugins/wc-multivendor-membership/"
 ],
 "attacksurface_url": "https://attacksurface.wpsec.com/plugin/wc-multivendor-membership",
 "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": "2026-11-03"
 }
}