{
 "id": "WPSEC-2026-1411",
 "url": "https://wpsec.com/vuln/WPSEC-2026-1411/",
 "json_url": "https://wpsec.com/vuln/WPSEC-2026-1411/advisory.json",
 "markdown_url": "https://wpsec.com/vuln/WPSEC-2026-1411/index.md",
 "title": "W3 Total Cache <= 2.10.7 - Unauthenticated Minify Cache Poisoning via 'b' Parameter and Query String",
 "description": "The W3 Total Cache plugin for WordPress is vulnerable to minify cache poisoning in all versions up to, and including, 2.10.7. In auto minify mode, public minified file requests accepted a query string on the file name, kept the request's 'b' (base) parameter, and derived the cache ID from the raw requested name. The base parameter could reroot the stored document-root-relative file list, and nothing stopped sources from inside the minify cache directory being used. This makes it possible for unauthenticated attackers to make the minifier build cached CSS/JS artifacts from files other than the intended ones, poisoning or misdirecting the minified assets served to site visitors.",
 "plugin": {
  "slug": "w3-total-cache",
  "name": "W3 Total Cache",
  "full_name": "W3 Total Cache",
  "wordpress_org": "https://wordpress.org/plugins/w3-total-cache/",
  "advisories_url": "https://wpsec.com/vuln/plugin/w3-total-cache/",
  "attacksurface": "https://attacksurface.wpsec.com/plugin/w3-total-cache"
 },
 "type": "CONTENT INJECTION",
 "cwe": [
  "CWE-73"
 ],
 "cve": [],
 "cvss": {
  "version": "3.1",
  "score": 5.3,
  "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
  "severity": "Medium"
 },
 "affected": {
  "ranges": [
   {
    "from": null,
    "from_inclusive": true,
    "to": "2.11.0",
    "to_inclusive": false
   }
  ],
  "text": [
   "all versions before 2.11.0"
  ]
 },
 "introduced_in": null,
 "fixed_in": "2.11.0",
 "remediation": "Update to 2.11.0 or later.",
 "fix_released": "2026-10-20T20:36:47+00:00",
 "published": "2026-10-21T20:43:15+00:00",
 "updated": "2026-10-21T12:33:09.908762+00:00",
 "also_published_as": null,
 "references": [
  "https://wpsec.com/vuln/WPSEC-2026-1411/",
  "https://plugins.svn.wordpress.org/w3-total-cache/tags/2.11.0/",
  "https://wordpress.org/plugins/w3-total-cache/"
 ],
 "attacksurface_url": "https://attacksurface.wpsec.com/plugin/w3-total-cache",
 "source": "WPSec",
 "license": {
  "name": "CC BY 4.0",
  "url": "https://creativecommons.org/licenses/by/4.0/"
 },
 "usage": {
  "plugin": "High",
  "affected_versions": "High",
  "as_of": "2026-10-21"
 }
}