CVE-2026-40742 | BDVDB-2026-327313 Detail

Nelio SoftwareNelio AB Testing

Description#

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.

Impact#

Exploiting Incorrectly Configured Access Control Security Levels

Weaknesses#

CWE-862 Missing Authorization

References#

https://patchstack.com/database/Wordpress/Plugin/nelio-ab-testing/vulnerability/wordpress-nelio-ab-testing-plugin-8-2-8-sensitive-data-exposure-vulnerability?_s_id=cve

Exploit#

No public exploit known

History#

Version 12026-04-15Record published in the CVE List.
Version 22026-04-29Most recent update recorded in the CVE List.

Published

Published: 2026-04-15
Last modified: 2026-04-29

Vendor information

Vendor: Nelio Software
Product: Nelio AB Testing

All Nelio Software vulnerabilities

Score

5.3 Medium

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 8.4.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Missing Authorization

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
<= 8.2.8
Fixed
Not stated
Vulnerable
Not stated
Fixed
8.3.0

Scoring System

CVSS v4.0

Not available

CVSS v3.1

5.3 Medium

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

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	None
User Interaction	None
Scope	Unchanged
Confidentiality	Low
Integrity	None
Availability	None

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).