Cyber Resilience

CVE-2026-42736

High

Published: 27 May 2026

Published
27 May 2026
Modified
27 May 2026
KEV Added
—
Patch
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CVSS Score v3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS Score 0.0025 15.7th percentile
Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-42736 is a high-severity Authorization Bypass Through User-Controlled Key (CWE-639) vulnerability. Its CVSS base score is 7.5 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 15.7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

Authorization Bypass Through User-Controlled Key vulnerability in wordplus BP Better Messages bp-better-messages allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects BP Better Messages: from n/a through <= 2.14.16.

CWE(s)
CWE-639

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
Why these techniques?

CWE-639 auth bypass in public-facing WordPress plugin directly enables exploitation of the application (T1190).

Confidence: HIGH · MITRE ATT&CK Enterprise v18.1

CVEs Like This One

CVE-2025-68044Shared CWE-639
CVE-2026-30230Shared CWE-639
CVE-2025-69394Shared CWE-639
CVE-2026-33356Shared CWE-639
CVE-2025-40805Shared CWE-639
CVE-2026-40600Shared CWE-639
CVE-2026-24379Shared CWE-639
CVE-2026-24136Shared CWE-639
CVE-2026-22234Shared CWE-639
CVE-2025-14844Shared CWE-639

Affected Assets

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

AC-24 Access Control Decisions
addresses: CWE-639

Per-request decision making makes it harder to bypass authorization using user-controlled keys without proper validation in the decision process.

AC-3 Access Enforcement
addresses: CWE-639

Consistent enforcement of approved authorizations makes bypassing via user-controlled keys ineffective.

References