CVE-2026-28090 is a Local File Inclusion (LFI) vulnerability found in the ThemeREX Gamezone WordPress theme, specifically in versions up to 1.1.11. The vulnerability arises from improper control over the filename parameter used in PHP include or require statements. This flaw allows an attacker to manipulate the input to these statements, causing the application to include unintended local files. Such inclusion can lead to arbitrary code execution if malicious files are uploaded or disclosure of sensitive server files such as configuration files, password files, or application source code. The vulnerability does not require authentication, making it exploitable by unauthenticated remote attackers. Although no public exploits are currently known, the nature of LFI vulnerabilities makes them attractive targets for attackers seeking to escalate privileges or gain persistent access. The lack of an official patch or update at the time of publication increases the urgency for affected users to implement mitigations. The vulnerability affects the PHP codebase of the Gamezone theme, which is widely used in gaming-related WordPress sites, potentially exposing a large number of websites to risk. The absence of a CVSS score necessitates an expert assessment of severity based on impact and exploitability factors.

The impact of CVE-2026-28090 can be severe for organizations using the vulnerable Gamezone theme. Successful exploitation can lead to unauthorized disclosure of sensitive files, including configuration files containing database credentials or other secrets, resulting in confidentiality breaches. Attackers may also execute arbitrary PHP code by including malicious files, leading to full system compromise, data theft, defacement, or use of the server as a pivot point for further attacks. The vulnerability can disrupt website availability if exploited to execute destructive commands. Given that WordPress powers a significant portion of the web, and the Gamezone theme targets gaming communities, the scope of affected systems is broad. Organizations relying on this theme for their online presence risk reputational damage, financial loss, and regulatory penalties if sensitive data is exposed. The ease of exploitation without authentication increases the threat level, making it a critical concern for website administrators and hosting providers.

To mitigate CVE-2026-28090, organizations should immediately audit their WordPress installations to identify the use of the vulnerable Gamezone theme versions (up to 1.1.11). If possible, upgrade to a patched version once available from ThemeREX. In the absence of an official patch, implement the following specific mitigations: 1) Restrict access to vulnerable PHP files by configuring web server rules to deny direct access to include/require entry points. 2) Employ web application firewalls (WAFs) with custom rules to detect and block suspicious requests attempting to manipulate include parameters. 3) Harden PHP configurations by disabling dangerous functions such as allow_url_include and restricting file system permissions to prevent unauthorized file uploads or modifications. 4) Monitor web server logs for anomalous requests indicative of LFI attempts. 5) Conduct regular backups and maintain an incident response plan to quickly recover from potential compromises. 6) Educate developers and administrators about secure coding practices to prevent similar vulnerabilities in custom themes or plugins.