{
 "id": "WPSEC-2026-1233",
 "url": "https://wpsec.com/vuln/WPSEC-2026-1233/",
 "json_url": "https://wpsec.com/vuln/WPSEC-2026-1233/advisory.json",
 "markdown_url": "https://wpsec.com/vuln/WPSEC-2026-1233/index.md",
 "title": "Echo Knowledge Base – Documentation, FAQs, AI Chat & AI Search <= 17.311.0 - Authenticated (Subscriber+) Missing Authorization to Arbitrary User Meta Update",
 "description": "The Echo Knowledge Base plugin for WordPress is vulnerable to unauthorized modification of data in all versions up to, and including, 17.311.0 due to a missing capability check and missing nonce validation on the ajax_dismiss_ongoing_notice AJAX action. The handler also did not validate the supplied 'epkb_dismiss_id' value. This makes it possible for authenticated attackers, with Subscriber-level access and above, to set user meta entries with arbitrary keys to the value 1 on their own account. Because the request had no nonce, it could also be forged on behalf of a logged-in user.",
 "plugin": {
  "slug": "echo-knowledge-base",
  "name": "Echo Knowledge Base – Documentation, FAQs, AI Chat & AI Search",
  "full_name": "Echo Knowledge Base – Documentation, FAQs, Chat & Smart Search",
  "wordpress_org": "https://wordpress.org/plugins/echo-knowledge-base/",
  "advisories_url": "https://wpsec.com/vuln/plugin/echo-knowledge-base/",
  "attacksurface": "https://attacksurface.wpsec.com/plugin/echo-knowledge-base"
 },
 "type": "NO AUTHORISATION",
 "cwe": [
  "CWE-862"
 ],
 "cve": [],
 "cvss": {
  "version": "3.1",
  "score": 4.3,
  "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
  "severity": "Medium"
 },
 "affected": {
  "ranges": [
   {
    "from": null,
    "from_inclusive": true,
    "to": "17.311.1",
    "to_inclusive": false
   }
  ],
  "text": [
   "all versions before 17.311.1"
  ]
 },
 "introduced_in": null,
 "fixed_in": "17.311.1",
 "remediation": "Update to 17.311.1 or later.",
 "fix_released": "2026-10-17T20:01:42+00:00",
 "published": "2026-10-18T20:43:08+00:00",
 "updated": "2026-10-18T10:55:40.981814+00:00",
 "also_published_as": null,
 "references": [
  "https://wpsec.com/vuln/WPSEC-2026-1233/",
  "https://plugins.svn.wordpress.org/echo-knowledge-base/tags/17.311.1/",
  "https://wordpress.org/plugins/echo-knowledge-base/"
 ],
 "attacksurface_url": "https://attacksurface.wpsec.com/plugin/echo-knowledge-base",
 "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": "2026-10-18"
 }
}