{
 "id": "WPSEC-2026-2173",
 "url": "https://wpsec.com/vuln/WPSEC-2026-2173/",
 "json_url": "https://wpsec.com/vuln/WPSEC-2026-2173/advisory.json",
 "markdown_url": "https://wpsec.com/vuln/WPSEC-2026-2173/index.md",
 "title": "Chameleon <= 1.4.9 - Missing Authorization to Unauthenticated Style Settings Update",
 "description": "The Chameleon plugin for WordPress is vulnerable to unauthorized modification of data via the third-party style switcher in all versions up to, and including, 1.4.9, due to a missing capability check on the wpc_third_party_support() function. The function is hooked to admin_init, which also fires for unauthenticated requests to admin-ajax.php and admin-post.php. This makes it possible for unauthenticated attackers to overwrite the site-wide Alphabetic Pagination style and template choices stored in the wp_chameleon option with arbitrary values through the 'ap_style' and 'ap_template' parameters. The Alphabetic Pagination plugin must be active.",
 "plugin": {
  "slug": "chameleon",
  "name": "Chameleon",
  "full_name": "Chameleon",
  "wordpress_org": "https://wordpress.org/plugins/chameleon/",
  "advisories_url": "https://wpsec.com/vuln/plugin/chameleon/",
  "attacksurface": "https://attacksurface.wpsec.com/plugin/chameleon"
 },
 "type": "NO AUTHORISATION",
 "cwe": [
  "CWE-862"
 ],
 "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": "1.5.0",
    "to_inclusive": false
   }
  ],
  "text": [
   "all versions before 1.5.0"
  ]
 },
 "introduced_in": null,
 "fixed_in": "1.5.0",
 "remediation": "Update to 1.5.0 or later.",
 "fix_released": "2026-10-30T06:31:23+00:00",
 "published": "2026-10-31T06:40:41+00:00",
 "updated": "2026-10-30T09:25:22.775511+00:00",
 "also_published_as": null,
 "references": [
  "https://wpsec.com/vuln/WPSEC-2026-2173/",
  "https://plugins.svn.wordpress.org/chameleon/tags/1.5.0/",
  "https://wordpress.org/plugins/chameleon/"
 ],
 "attacksurface_url": "https://attacksurface.wpsec.com/plugin/chameleon",
 "source": "WPSec",
 "license": {
  "name": "CC BY 4.0",
  "url": "https://creativecommons.org/licenses/by/4.0/"
 },
 "usage": {
  "plugin": "Low",
  "affected_versions": "None seen",
  "as_of": "2026-10-31"
 }
}