Cyber Resilience

CVE-2026-22500

CriticalRCE

Published: 25 March 2026

Published
25 March 2026
Modified
24 April 2026
KEV Added
—
Patch
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CVSS Score v3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0051 39.5th percentile
Risk Priority 70 floored blend · peak EPSS

Summary

CVE-2026-22500 is a critical-severity Deserialization of Untrusted Data (CWE-502) vulnerability. Its CVSS base score is 9.8 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 39.5th 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 RA-5 (Vulnerability Monitoring and Scanning) and SI-10 (Information Input Validation).

Deeper analysis

CVE-2026-22500 is a Deserialization of Untrusted Data vulnerability (CWE-502) in the axiomthemes "m2 | Construction and Tools Store" WordPress theme, also known as m2-ce. This flaw enables Object Injection and affects all versions from n/a through 1.1.2.

With a CVSS v3.1 base score of 9.8 (Critical; AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H), the vulnerability can be exploited over the network by unauthenticated attackers requiring low complexity and no user interaction. Exploitation allows attackers to achieve high impacts on confidentiality, integrity, and availability, potentially leading to full site compromise via injected objects.

The Patchstack advisory at https://patchstack.com/database/Wordpress/Theme/m2-ce/vulnerability/wordpress-m2-construction-and-tools-store-theme-1-1-2-php-object-injection-vulnerability?_s_id=cve provides details on this PHP Object Injection issue in theme version 1.1.2, including mitigation guidance for affected WordPress installations.

OWASP Top 10 for Web (2025)

A08:2025 Software or Data Integrity Failures

EU & UK References

Vulnerability details

Deserialization of Untrusted Data vulnerability in axiomthemes m2 | Construction and Tools Store m2-ce allows Object Injection.This issue affects m2 | Construction and Tools Store: from n/a through <= 1.1.2.

CWE(s)
CWE-502

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?

Direct unauthenticated RCE via deserialization/object injection in public-facing WordPress theme component.

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

CVEs Like This One

CVE-2025-62368Shared CWE-502
CVE-2025-68903Shared CWE-502
CVE-2025-67911Shared CWE-502
CVE-2025-54014Shared CWE-502
CVE-2026-22505Shared CWE-502
CVE-2025-53078Shared CWE-502
CVE-2026-43633Shared CWE-502
CVE-2025-60039Shared CWE-502
CVE-2026-25429Shared CWE-502
CVE-2025-7697Shared CWE-502

Affected Assets

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

SI-2 Flaw Remediation good match
prevent

SI-2 requires organizations to remediate flaws, directly addressing this deserialization vulnerability by patching or updating the vulnerable m2-ce WordPress theme.

SI-10 Information Input Validation good match
prevent

SI-10 mandates information input validation at entry points, preventing untrusted data from being deserialized into objects in the theme.

RA-5 Vulnerability Monitoring and Scanning good match
detect

RA-5 vulnerability scanning identifies the PHP object injection flaw in the theme, enabling proactive mitigation before exploitation.

References