{
 "id": "WPSEC-2026-2711",
 "url": "https://wpsec.com/vuln/WPSEC-2026-2711/",
 "json_url": "https://wpsec.com/vuln/WPSEC-2026-2711/advisory.json",
 "markdown_url": "https://wpsec.com/vuln/WPSEC-2026-2711/index.md",
 "title": "User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder <= 5.3.1 - Unauthenticated Arbitrary Shortcode Execution via 'ur_error' and 'info' Parameters",
 "description": "The User Registration & Membership plugin for WordPress is vulnerable to Arbitrary Shortcode Execution via the 'ur_error' and 'info' query parameters in all versions up to, and including, 5.3.1, due to the plugin adding these values to front-end login notices and the membership thank-you page with their square brackets intact. That output is then passed through do_shortcode(): the login preview injects it into the_content before shortcodes run, and the plugin's Login Form, My Account and Thank You blocks are rendered before the_content runs shortcodes. Any visitor could also turn on the login preview just by adding 'ur_login_preview' to a URL. This makes it possible for unauthenticated attackers to execute arbitrary shortcodes.",
 "plugin": {
  "slug": "user-registration",
  "name": "User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder",
  "full_name": "User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder",
  "wordpress_org": "https://wordpress.org/plugins/user-registration/",
  "advisories_url": "https://wpsec.com/vuln/plugin/user-registration/",
  "attacksurface": "https://attacksurface.wpsec.com/plugin/user-registration"
 },
 "type": "UNKNOWN",
 "cwe": [
  "CWE-94"
 ],
 "cve": [],
 "cvss": {
  "version": "3.1",
  "score": 7.3,
  "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
  "severity": "High"
 },
 "affected": {
  "ranges": [
   {
    "from": null,
    "from_inclusive": true,
    "to": "5.3.2",
    "to_inclusive": false
   }
  ],
  "text": [
   "all versions before 5.3.2"
  ]
 },
 "introduced_in": null,
 "fixed_in": "5.3.2",
 "remediation": "Update to 5.3.2 or later.",
 "fix_released": "2026-11-06T11:46:22+00:00",
 "published": "2026-11-07T12:41:15+00:00",
 "updated": "2026-11-07T11:11:19.674580+00:00",
 "also_published_as": null,
 "references": [
  "https://wpsec.com/vuln/WPSEC-2026-2711/",
  "https://plugins.svn.wordpress.org/user-registration/tags/5.3.2/",
  "https://wordpress.org/plugins/user-registration/"
 ],
 "attacksurface_url": "https://attacksurface.wpsec.com/plugin/user-registration",
 "source": "WPSec",
 "license": {
  "name": "CC BY 4.0",
  "url": "https://creativecommons.org/licenses/by/4.0/"
 },
 "usage": {
  "plugin": "Medium",
  "affected_versions": "Medium",
  "as_of": "2026-11-07"
 }
}