CVE-2026-6393

BetterDocs <= 4.3.11 - Missing Authorization to Authenticated (Subscriber+) Unauthorized AI API Usage

2026-04-23 14:45
h0xilo

Strategic Overview

Status
Patched in 4.3.12
Affected Plugin
BetterDocs – AI Documentation, Knowledge Base, Docs, Wikis, FAQ with Chatbot
Affected Version
<= 4.3.11
CVSS
4.3Medium
Weakness type
CWE-862 · Missing Authorization
CVE
CVE-2026-6393
View all BetterDocs – AI Documentation, Knowledge Base, Docs, Wikis, FAQ with Chatbot vulnerabilities

At a glance

CVE-2026-6393 is a medium-severity Missing Authorization vulnerability in the BetterDocs WordPress plugin, affecting versions <= 4.3.11. It carries a CVSS score of 4.3 (reachable over the network; low attack complexity). Exploitation requires an authenticated account at Subscriber level or above. The issue is fixed in version 4.3.12; sites on affected versions should update now. Disclosed April 2026, reported by h0xilo.

Vulnerability Overview

The BetterDocs plugin for WordPress is vulnerable to Missing Authorization in versions up to and including 4.3.11. This is due to a missing capability check in the generate_openai_content_callback() function, which relies solely on a nonce rather than verifying user permissions. This makes it possible for authenticated attackers, with subscriber-level access and above, to trigger OpenAI API calls using the site's configured API key with arbitrary user-controlled prompts, leading to unauthorized consumption of the site owner's paid AI API quota.

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

BetterDocs <= 4.3.11 carries this weakness at generate_openai_content_callback(), and reaching it takes an account at Subscriber level or above. 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 BetterDocs the fix is 4.3.12: builds <= 4.3.11 are affected, anything from 4.3.12 onward is not.

Remediation

Update to version 4.3.12, 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: BetterDocs 4.3.12 closes this, and updating the plugin is the step that ends it.

  • Login Security
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-6393https://www.wordfence.com/threat-intel/vulnerabilities/id/432b11be-174d-45d6-aa3b-2fbfa85ec17ahttps://nvd.nist.gov/vuln/detail/CVE-2026-6393

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C