{
 "id": "WPSEC-2026-0729",
 "url": "https://wpsec.com/vuln/WPSEC-2026-0729/",
 "json_url": "https://wpsec.com/vuln/WPSEC-2026-0729/advisory.json",
 "markdown_url": "https://wpsec.com/vuln/WPSEC-2026-0729/index.md",
 "title": "CMB2 <= 2.13.3 - Reflected Cross-Site Scripting via Object ID Request Parameters",
 "description": "The CMB2 plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'user_id', 'tag_ID', 'c' and 'post' request parameters in all versions up to, and including, 2.13.3. The plugin uses these values as the box object ID after only sanitize_text_field(), which keeps quotes, and outputs them unescaped in the oembed field's single-quoted data-objectid attribute. This makes it possible for unauthenticated attackers to inject arbitrary web scripts into admin edit screens (such as the user profile or term edit screen) that render a CMB2 box with an oembed field. The scripts run if the attacker can trick a logged-in user, such as an administrator, into performing an action like clicking on a link.",
 "plugin": {
  "slug": "cmb2",
  "name": "CMB2",
  "full_name": "CMB2",
  "wordpress_org": "https://wordpress.org/plugins/cmb2/",
  "advisories_url": "https://wpsec.com/vuln/plugin/cmb2/",
  "attacksurface": "https://attacksurface.wpsec.com/plugin/cmb2"
 },
 "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": null,
    "from_inclusive": true,
    "to": "2.13.4",
    "to_inclusive": false
   }
  ],
  "text": [
   "all versions before 2.13.4"
  ]
 },
 "introduced_in": null,
 "fixed_in": "2.13.4",
 "remediation": "Update to 2.13.4 or later.",
 "fix_released": "2026-10-09T02:25:51+00:00",
 "published": "2026-10-10T15:41:27+00:00",
 "updated": "2026-10-10T14:53:43.403967+00:00",
 "also_published_as": null,
 "references": [
  "https://wpsec.com/vuln/WPSEC-2026-0729/",
  "https://plugins.svn.wordpress.org/cmb2/tags/2.13.4/",
  "https://wordpress.org/plugins/cmb2/"
 ],
 "attacksurface_url": "https://attacksurface.wpsec.com/plugin/cmb2",
 "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": "2026-10-10"
 }
}