Echo Knowledge Base – Documentation, FAQs, AI Chat & AI Search <= 16.011.0 - Missing Authorization
Strategic Overview
- Status
- Patched in 16.20.0
- Affected Version
<= 16.011.0- CVSS
- 4.3Medium
- Weakness type
- CWE-862 · Missing Authorization
- CVE
CVE-2026-25402
At a glance
CVE-2026-25402 is a medium-severity Missing Authorization vulnerability in the Echo Knowledge Base WordPress plugin, affecting versions <= 16.011.0. It carries a CVSS score of 4.3 (reachable over the network; low attack complexity). The root cause is a missing authorization check on a reachable function. The issue is fixed in version 16.20.0; sites on affected versions should update now. Disclosed January 2026, reported by Nabil Irawan.
Vulnerability Overview
The Echo Knowledge Base – Documentation, FAQs, Chat & Smart Search plugin for WordPress is vulnerable to unauthorized access due to a missing capability check on a function in all versions up to, and including, 16.011.0. This makes it possible for authenticated attackers, with Subscriber-level access and above, to perform an unauthorized action.
Technical Analysis
The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user.
CWE-862: Missing Authorization
Reaching this weakness in Echo Knowledge Base <= 16.011.0 takes a caller who can reach the endpoint. A missing authorization check means a function is reachable by anyone who can reach the endpoint, because the code never asks whether the caller is allowed to perform the action.
Any user who can reach the endpoint gets to run an action reserved for higher-privileged roles, from reading protected data to changing settings or content. For Echo Knowledge Base the fix is 16.20.0: builds <= 16.011.0 are affected, anything from 16.20.0 onward is not.
Remediation
Update to version 16.20.0, or a newer patched version
How does WordSec protect against this?
Because it turns on account access, WordSec's login security is the relevant layer: role-based two-factor, captcha and brute-force limits raise the cost of getting the account this needs. None of that substitutes for the fix: Echo Knowledge Base 16.20.0 closes this, and updating the plugin is the step that ends it.
- Login Security
- Alerts
External References
Related records
Other vulnerabilities in Echo Knowledge Base – Documentation, FAQs, Chat & Smart Search
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