CVE-2026-40742 MEDIUM

CVE-2026-40742: WordPress Nelio AB Testing plugin <= 8.2.8 - Sensitive Data Exposure vulnerability

Vendor Nelio Software
Product Nelio AB Testing
Weakness CWE-862 · Missing authorization
Published April 15, 2026
Last update April 29, 2026

CVSS base score

5.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality Low
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

What the vulnerability does

01Description

Missing Authorization vulnerability in Nelio Software Nelio AB Testing nelio-ab-testing allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Nelio AB Testing: from n/a through <= 8.2.8.

Explanation of Vulnerability in Simple Terms

02Summary

Nelio AB Testing versions 8.2.8 and earlier lack proper authorization checks, allowing unauthenticated attackers to read sensitive data. The vulnerability requires only network access and no user interaction. An attacker can retrieve confidential information without logging in or performing any special actions.

What an attacker can do

03Attacker Capabilities

Read sensitive data from the plugin without logging in.

Potential impact on your site

04Site Impact

Confidential information stored by the plugin may be exposed to anyone on the internet.

Conditions required to exploit

05Prerequisites

Network access to the site; no authentication or user interaction required.

Key dates

06Disclosure timeline

April 15, 2026 CVE published
April 29, 2026 Record updated

Related vulnerabilities

08Related CVE