CVE-2026-22454 CRITICAL

CVE-2026-22454: WordPress Solaris theme <= 2.5 - PHP Object Injection vulnerability

Vendor Themerex
Product Solaris
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 Solaris solaris allows Object Injection.This issue affects Solaris: from n/a through <= 2.5.

Explanation of Vulnerability in Simple Terms

02Summary

Solaris versions 2.5 and earlier contain a deserialization vulnerability that allows unauthenticated attackers to execute arbitrary code on the server. The vulnerability exists in how the product processes untrusted serialized data without proper validation. An attacker can exploit this remotely without authentication or user interaction to gain full control of the affected system.

What an attacker can do

03Attacker Capabilities

Run arbitrary code on the server, read/modify all site data, and take complete control of the system.

Potential impact on your site

04Site Impact

Complete compromise of the site and server; attacker can steal data, modify content, install malware, or destroy the installation.

Conditions required to exploit

05Prerequisites

Network access only; no authentication or user interaction required.

Key dates

06Disclosure timeline

March 5, 2026 CVE published
April 28, 2026 Record updated