Vulnerabilities / Echo Knowledge Base – Documentation, FAQs, AI Chat & AI Search / WPSEC-2026-1233
Echo Knowledge Base – Documentation, FAQs, AI Chat & AI Search <= 17.311.0 - Authenticated (Subscriber+) Missing Authorization to Arbitrary User Meta Update
Medium 4.3
CWE-862Fixed in 17.311.1
- ID
- WPSEC-2026-1233
- Plugin
- Echo Knowledge Base – Documentation, FAQs, Chat & Smart Search (echo-knowledge-base)
- Affected
- all versions before 17.311.1
- Remediation
- Update to 17.311.1 or later.
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
- Weakness
- CWE-862
- Usage
- Plugin Low · Affected versions None seen among sites WPSec scans, 2026-10-18
- Attack surface
- Echo Knowledge Base – Documentation, FAQs, AI Chat & AI Search on WPSec AttackSurface
- Fix released
- Published
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.
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/
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