CVE-2026-27438 CRITICAL

CVE-2026-27438: WordPress Kingler theme <= 1.7 - PHP Object Injection vulnerability

Vendor Themerex

Product Kingler

Weakness CWE-502 · Unsafe deserialization

Published March 5, 2026

Last update April 28, 2026

View on NVD All CVEs

CVSS base score

9.8/10

Attack vector Network

Attack complexity Low

Privileges required None

User interaction None

Confidentiality High

Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

Deserialization of Untrusted Data vulnerability in ThemeREX Kingler kingler allows Object Injection.This issue affects Kingler: from n/a through <= 1.7.

Explanation of Vulnerability in Simple Terms

02Summary

Kingler versions 1.7 and earlier contain a deserialization vulnerability that allows unauthenticated attackers to run arbitrary code on the site by sending a specially crafted request. No user interaction is required. The vulnerability affects all confidentiality, integrity, and availability of the affected system.

What an attacker can do

03Attacker Capabilities

Run arbitrary code on the site without authentication.

Potential impact on your site

04Site Impact

Complete compromise of the site: data theft, malware injection, and service disruption.

Conditions required to exploit

05Prerequisites

Network access to the site; no authentication or user interaction required.

Key dates

06Disclosure timeline

March 5, 2026 CVE published

April 28, 2026 Record updated

External resources

07References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2026-27438 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/502.html AskarLabs — CWE-502 write-up Deserialization of Untrusted Data

Related vulnerabilities