CVE-2026-40742

MEDIUMNVD 5.35.3—

5.3

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.

CVSS v3: 5.3
EG Score: 5.3(medium)
EPSS: 12.6%
KEV: Not listed

Published

April 15, 2026

Last Modified

April 29, 2026

References (1)

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

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-862Missing Authorization

Data Freshness Timeline

(refreshed 16× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-31 22:30 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
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2026-05-31 00:16 UTCepss_batch
2026-05-29 13:44 UTCepss_batch
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2026-05-28 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-26 13:44 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-20 22:38 UTCepss_batch
2026-05-20 22:38 UTCepss_batch
2026-05-20 17:10 UTCEG score recompute
2026-05-20 17:10 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-40742?

CVE-2026-40742 is a medium vulnerability published on April 15, 2026. 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.

When was CVE-2026-40742 disclosed?

CVE-2026-40742 was first published in the National Vulnerability Database on April 15, 2026, with the most recent update on April 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2026-40742 actively exploited?

CVE-2026-40742 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 12.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2026-40742?

CVE-2026-40742 has a CVSS v3 base score of 5.3 (NVD).

How do I remediate CVE-2026-40742?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-40742, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2026-40742

📅 Published

🔄 Last Modified

🔗 References (1)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2026-40742?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (1)

Frequently asked(5)

Related CVEs(same CWE)