Cyber Resilience

CVE-2025-68853

HighRCE

Published: 20 February 2026

Published
20 February 2026
Modified
27 April 2026
KEV Added
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Patch
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CVSS Score v3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS Score 0.0033 24.6th percentile
Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2025-68853 is a high-severity Deserialization of Untrusted Data (CWE-502) vulnerability. Its CVSS base score is 8.8 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 24.6th 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 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).

Deeper analysis

CVE-2025-68853 is a Deserialization of Untrusted Data vulnerability (CWE-502) in the Kleor Contact Manager WordPress plugin (contact-manager), which allows Object Injection. This issue affects the plugin from unknown initial versions through 9.1.1. The vulnerability was published on 2026-02-20 and carries a CVSS v3.1 base score of 8.8 (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).

An unauthenticated remote attacker can exploit this vulnerability over the network with low attack complexity by tricking an authenticated user into performing an action that triggers deserialization of untrusted data, such as user interaction with a malicious input. Successful exploitation enables object injection, potentially leading to high impacts on confidentiality, integrity, and availability.

The Patchstack advisory documents this as a PHP Object Injection vulnerability in the WordPress Contact Manager plugin, specifically referencing version 9.0.1, with details available at https://patchstack.com/database/Wordpress/Plugin/contact-manager/vulnerability/wordpress-contact-manager-plugin-9-0-1-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 Kleor Contact Manager contact-manager allows Object Injection.This issue affects Contact Manager: from n/a through <= 9.1.1.

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?

CVE describes remote exploitation of a public-facing WordPress plugin via PHP object injection (deserialization of untrusted data), directly mapping to T1190 as the initial access vector.

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

Directly remediates the deserialization of untrusted data flaw in the Kleor Contact Manager plugin by identifying, reporting, and applying patches to affected versions up to 9.1.1.

SI-10 Information Input Validation good match
prevent

Validates untrusted inputs to the WordPress plugin to prevent deserialization of malicious objects tricked via user interaction.

SI-7 Software, Firmware, and Information Integrity partial match
preventdetect

Verifies integrity of software, firmware, and information in the plugin to detect unauthorized modifications from object injection exploitation.

References