{
 "id": "WPSEC-2026-2736",
 "url": "https://wpsec.com/vuln/WPSEC-2026-2736/",
 "json_url": "https://wpsec.com/vuln/WPSEC-2026-2736/advisory.json",
 "markdown_url": "https://wpsec.com/vuln/WPSEC-2026-2736/index.md",
 "title": "Speed Booster Pack <= 4.5.9.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via Image Attributes",
 "description": "The Speed Booster Pack ⚡ PageSpeed Optimization Suite plugin for WordPress is vulnerable to Stored Cross-Site Scripting via image, source and iframe attributes in post content in all versions up to, and including, 4.5.9.1. This is due to the lazy-load output rewriting. It matches the first ' src=' text anywhere in a tag, including inside another attribute value such as alt text, and inserts a double-quoted placeholder there. This closes the surrounding double-quoted attribute, so text that passed content filtering inside the attribute becomes live attributes such as event handlers. 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 while lazy loading is enabled.",
 "plugin": {
  "slug": "speed-booster-pack",
  "name": "Speed Booster Pack",
  "full_name": "Speed Booster Pack ⚡ PageSpeed Optimization Suite",
  "wordpress_org": "https://wordpress.org/plugins/speed-booster-pack/",
  "advisories_url": "https://wpsec.com/vuln/plugin/speed-booster-pack/",
  "attacksurface": "https://attacksurface.wpsec.com/plugin/speed-booster-pack"
 },
 "type": "XSS",
 "cwe": [
  "CWE-79"
 ],
 "cve": [],
 "cvss": {
  "version": "3.1",
  "score": 6.4,
  "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N",
  "severity": "Medium"
 },
 "affected": {
  "ranges": [
   {
    "from": "3.8.5",
    "from_inclusive": true,
    "to": "4.5.9.2",
    "to_inclusive": false
   }
  ],
  "text": [
   "from 3.8.5 before 4.5.9.2"
  ]
 },
 "introduced_in": "3.8.5",
 "fixed_in": "4.5.9.2",
 "remediation": "Update to 4.5.9.2 or later.",
 "fix_released": "2026-11-07T06:17:50+00:00",
 "published": "2026-11-08T06:41:44+00:00",
 "updated": "2026-11-07T11:09:31.415926+00:00",
 "also_published_as": null,
 "references": [
  "https://wpsec.com/vuln/WPSEC-2026-2736/",
  "https://plugins.svn.wordpress.org/speed-booster-pack/tags/4.5.9.2/",
  "https://wordpress.org/plugins/speed-booster-pack/"
 ],
 "attacksurface_url": "https://attacksurface.wpsec.com/plugin/speed-booster-pack",
 "source": "WPSec",
 "license": {
  "name": "CC BY 4.0",
  "url": "https://creativecommons.org/licenses/by/4.0/"
 },
 "usage": {
  "plugin": "Low",
  "affected_versions": "Low",
  "as_of": "2026-11-08"
 }
}