{
 "id": "WPSEC-2026-0547",
 "url": "https://wpsec.com/vuln/WPSEC-2026-0547/",
 "json_url": "https://wpsec.com/vuln/WPSEC-2026-0547/advisory.json",
 "markdown_url": "https://wpsec.com/vuln/WPSEC-2026-0547/index.md",
 "title": "WebinarPress <= 1.33.30 - Unauthenticated Reflected Cross-Site Scripting via 'content' Parameter",
 "description": "The WebinarPress plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'content' parameter of its embedded iframe handler in versions 1.33.21 up to, and including, 1.33.30 due to a missing capability check and insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as submitting a crafted form.",
 "plugin": {
  "slug": "wp-webinarsystem",
  "name": "WebinarPress",
  "full_name": "WebinarPress – Webinar System for WordPress",
  "wordpress_org": "https://wordpress.org/plugins/wp-webinarsystem/",
  "advisories_url": "https://wpsec.com/vuln/plugin/wp-webinarsystem/",
  "attacksurface": "https://attacksurface.wpsec.com/plugin/wp-webinarsystem"
 },
 "type": "XSS",
 "cwe": [
  "CWE-79"
 ],
 "cve": [],
 "cvss": {
  "version": "3.1",
  "score": 6.1,
  "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
  "severity": "Medium"
 },
 "affected": {
  "ranges": [
   {
    "from": "1.33.21",
    "from_inclusive": true,
    "to": "1.33.31",
    "to_inclusive": false
   }
  ],
  "text": [
   "from 1.33.21 before 1.33.31"
  ]
 },
 "introduced_in": "1.33.21",
 "fixed_in": "1.33.31",
 "remediation": "Update to 1.33.31 or later.",
 "fix_released": "2026-10-06T05:01:27+00:00",
 "published": "2026-10-07T14:47:02+00:00",
 "updated": "2026-10-07T13:54:54.861364+00:00",
 "also_published_as": null,
 "references": [
  "https://wpsec.com/vuln/WPSEC-2026-0547/",
  "https://plugins.svn.wordpress.org/wp-webinarsystem/tags/1.33.31/",
  "https://wordpress.org/plugins/wp-webinarsystem/"
 ],
 "attacksurface_url": "https://attacksurface.wpsec.com/plugin/wp-webinarsystem",
 "source": "WPSec",
 "license": {
  "name": "CC BY 4.0",
  "url": "https://creativecommons.org/licenses/by/4.0/"
 },
 "usage": {
  "plugin": "Low",
  "affected_versions": "Low",
  "as_of": "2026-10-07"
 }
}