Cyber Resilience

CVE-2026-27388

High

Published: 05 March 2026

Published
05 March 2026
Modified
22 April 2026
KEV Added
—
Patch
—
CVSS Score v3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score 0.0002 5.7th percentile
Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-27388 is a high-severity Missing Authorization (CWE-862) 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 5.7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified are NIST 800-53 AC-3 (Access Enforcement) and SC-5 (Denial-of-service Protection).

Deeper analysis

CVE-2026-27388 is a missing authorization vulnerability, mapped to CWE-862, in the DesignThemes Booking Manager WordPress plugin (designthemes-booking-manager). It enables exploitation of incorrectly configured access control security levels and affects all versions from n/a through 2.0 inclusive. The vulnerability carries a CVSS v3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H), highlighting its high severity with a primary impact on availability.

Unauthenticated attackers can exploit this issue over the network with low attack complexity and no user interaction. Exploitation results in high-impact denial of service, potentially disrupting site functionality without affecting confidentiality or integrity.

The Patchstack advisory at https://patchstack.com/database/Wordpress/Plugin/designthemes-booking-manager/vulnerability/wordpress-designthemes-booking-manager-plugin-2-0-broken-access-control-vulnerability?_s_id=cve documents the broken access control vulnerability in plugin version 2.0 and provides further details for mitigation.

EU & UK References

Vulnerability details

Missing Authorization vulnerability in designthemes DesignThemes Booking Manager designthemes-booking-manager allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects DesignThemes Booking Manager: from n/a through <= 2.0.

CWE(s)
CWE-862

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 →
T1499.004 Application or System Exploitation Impact
Adversaries may exploit software vulnerabilities that can cause an application or system to crash and deny availability to users.
attack.mitre.org →
Why these techniques?

Missing authorization (CWE-862) in public-facing WordPress plugin directly enables unauthenticated network exploitation for high-impact DoS via application abuse.

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

CVEs Like This One

CVE-2026-25317Shared CWE-862
CVE-2026-31921Shared CWE-862
CVE-2026-0490Shared CWE-862
CVE-2026-32441Shared CWE-862
CVE-2025-69340Shared CWE-862
CVE-2024-13655Shared CWE-862
CVE-2026-30970Shared CWE-862
CVE-2026-25242Shared CWE-862
CVE-2026-45209Shared CWE-862
CVE-2026-25026Shared CWE-862

Affected Assets

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

AC-3 Access Enforcement good match
prevent

AC-3 mandates enforcement of approved authorizations for logical access to information and system resources, directly mitigating the missing authorization vulnerability that allows unauthenticated DoS exploitation.

SI-2 Flaw Remediation good match
prevent

SI-2 requires organizations to identify, report, and correct flaws like this broken access control vulnerability in the WordPress plugin, preventing exploitation through timely patching.

SC-5 Denial-of-service Protection good match
preventdetect

SC-5 employs technical mechanisms to detect and prevent denial-of-service attacks, addressing the high availability impact from unauthenticated exploitation of this vulnerability.

References