{
 "id": "WPSEC-2026-0539",
 "url": "https://wpsec.com/vuln/WPSEC-2026-0539/",
 "json_url": "https://wpsec.com/vuln/WPSEC-2026-0539/advisory.json",
 "markdown_url": "https://wpsec.com/vuln/WPSEC-2026-0539/index.md",
 "title": "LazyLoad Plugin <= 2.4.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via YouTube Video Title",
 "description": "The LazyLoad Plugin plugin for WordPress is vulnerable to DOM-based Stored Cross-Site Scripting via the title of embedded YouTube videos in versions 2.3.8.2 up to, and including, 2.4.0. This is due to the front-end YouTube preview script inserting the video iframe's title, read back from the data-alt attribute, into markup through innerHTML without escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page, by embedding a YouTube video whose title they control. Exploitation requires the 'Iframes & Videos' and 'Replace Youtube videos by thumbnail' options to be enabled.",
 "plugin": {
  "slug": "rocket-lazy-load",
  "name": "LazyLoad Plugin",
  "full_name": "LazyLoad Plugin – Lazy Load Images, Videos, and Iframes",
  "wordpress_org": "https://wordpress.org/plugins/rocket-lazy-load/",
  "advisories_url": "https://wpsec.com/vuln/plugin/rocket-lazy-load/",
  "attacksurface": "https://attacksurface.wpsec.com/plugin/rocket-lazy-load"
 },
 "type": "XSS",
 "cwe": [
  "CWE-79"
 ],
 "cve": [],
 "cvss": {
  "version": "3.1",
  "score": 4.9,
  "vector": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N",
  "severity": "Medium"
 },
 "affected": {
  "ranges": [
   {
    "from": "2.3.8.2",
    "from_inclusive": true,
    "to": "2.4.1",
    "to_inclusive": false
   }
  ],
  "text": [
   "from 2.3.8.2 before 2.4.1"
  ]
 },
 "introduced_in": "2.3.8.2",
 "fixed_in": "2.4.1",
 "remediation": "Update to 2.4.1 or later.",
 "fix_released": "2026-10-06T12:40:33+00:00",
 "published": "2026-10-07T12:46:23+00:00",
 "updated": "2026-10-06T16:17:05.529019+00:00",
 "also_published_as": null,
 "references": [
  "https://wpsec.com/vuln/WPSEC-2026-0539/",
  "https://plugins.svn.wordpress.org/rocket-lazy-load/tags/2.4.1/",
  "https://wordpress.org/plugins/rocket-lazy-load/"
 ],
 "attacksurface_url": "https://attacksurface.wpsec.com/plugin/rocket-lazy-load",
 "source": "WPSec",
 "license": {
  "name": "CC BY 4.0",
  "url": "https://creativecommons.org/licenses/by/4.0/"
 },
 "usage": {
  "plugin": "Medium",
  "affected_versions": "Medium",
  "as_of": "2026-10-07"
 }
}