Cyber Resilience

CVE-2026-23549

CriticalRCE

Published: 19 February 2026

Published
19 February 2026
Modified
15 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 0.0038 30.0th percentile
Risk Priority 70 floored blend · peak EPSS

Summary

CVE-2026-23549 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 30.0th 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-2 (Flaw Remediation).

Deeper analysis

CVE-2026-23549 is a Deserialization of Untrusted Data vulnerability (CWE-502) in the WpEvently plugin, developed by magepeopleteam and also referred to as mage-eventpress, for WordPress. The flaw enables Object Injection and affects all versions of the plugin from unknown initial release through 5.1.1 inclusive. Published on 2026-02-19, it carries a CVSS v3.1 base score of 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H), marking it as critical severity.

An unauthenticated attacker can exploit the vulnerability remotely over the network with low attack complexity and no requirement for user interaction. Successful exploitation grants high-impact access to confidentiality, integrity, and availability, potentially allowing arbitrary code execution or other severe compromises via injected objects.

The Patchstack advisory documents this PHP Object Injection issue in WpEvently version 5.1.1 and provides details on vulnerability management for the WordPress plugin, available at https://patchstack.com/database/Wordpress/Plugin/mage-eventpress/vulnerability/wordpress-wpevently-plugin-5-1-1-php-object-injection-vulnerability?_s_id=cve.

OWASP Top 10 for Web (2025)

A08:2025 Software or Data Integrity Failures

EU & UK References

Vulnerability details

Deserialization of Untrusted Data vulnerability in magepeopleteam WpEvently mage-eventpress allows Object Injection.This issue affects WpEvently: from n/a through <= 5.1.1.

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 remote unauthenticated RCE via PHP deserialization/object injection in a public-facing WordPress plugin.

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

Timely flaw remediation through patching the vulnerable WpEvently plugin versions <=5.1.1 directly eliminates the deserialization of untrusted data vulnerability in CVE-2026-23549.

RA-5 Vulnerability Monitoring and Scanning good match
detect

Vulnerability monitoring and scanning identifies systems running affected WpEvently plugin versions exposed to this object injection flaw.

SI-10 Information Input Validation partial match
prevent

Information input validation restricts or sanitizes untrusted data prior to deserialization, mitigating object injection exploitation in the plugin.

References