Cyber Resilience

CVE-2026-22473

HighRCE

Published: 05 March 2026

Published
05 March 2026
Modified
22 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:L/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0037 28.5th percentile
Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2026-22473 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 28.5th 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 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).

Deeper analysis

CVE-2026-22473 is a Deserialization of Untrusted Data vulnerability (CWE-502) in the Dental Clinic WordPress theme by designthemes, enabling Object Injection. The issue affects the Dental Clinic theme from unknown initial versions through version 3.7 inclusive. Published on 2026-03-05, it carries a CVSS v3.1 base score of 8.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H), indicating high severity due to network accessibility, low attack complexity, and significant impacts.

Low-privileged remote users (PR:L) can exploit this vulnerability over the network without requiring user interaction. Successful exploitation allows attackers to achieve high levels of impact on confidentiality, integrity, and availability through object injection via untrusted deserialization.

The Patchstack advisory provides further details on this PHP object injection vulnerability in the WordPress Dental Clinic theme version 3.7, available at https://patchstack.com/database/Wordpress/Theme/dental/vulnerability/wordpress-dental-clinic-theme-3-7-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 designthemes Dental Clinic dental allows Object Injection.This issue affects Dental Clinic: from n/a through <= 3.7.

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 exploitation of a public-facing WordPress theme via PHP object injection/deserialization (CWE-502) over the network.

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

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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 Dental Clinic WordPress theme, preventing object injection exploitation.

SI-10 Information Input Validation good match
prevent

Validates untrusted inputs prior to deserialization to block malicious payloads that enable object injection in the vulnerable theme.

RA-5 Vulnerability Monitoring and Scanning partial match
detect

Scans for and identifies the specific deserialization vulnerability (CVE-2026-22473) in WordPress themes to facilitate timely remediation.

References