CVE-2026-28094 is a Local File Inclusion (LFI) vulnerability found in the ThemeREX RexCoin WordPress theme, specifically due to improper control over the filename used in PHP include or require statements. This vulnerability arises when the application fails to properly validate or sanitize user-supplied input that determines which files are included or required by the PHP runtime. An attacker can exploit this flaw by manipulating input parameters to include arbitrary files from the server's filesystem, potentially leading to sensitive information disclosure, code execution, or further exploitation chains. The affected product is RexCoin theme versions up to 1.2.6. Although no public exploits have been reported, the vulnerability is significant because LFI can be a stepping stone to remote code execution if combined with other weaknesses, such as log poisoning or upload of malicious files. The vulnerability was reserved and published in early 2026, but no CVSS score has been assigned yet. The lack of patch links indicates that a fix may not be publicly available at this time. The vulnerability does not require authentication, increasing the risk profile. The exploitability depends on the attacker's ability to influence the filename parameter used in include/require statements. Given the widespread use of WordPress and associated themes, this vulnerability could affect many websites globally, especially those using the RexCoin theme for cryptocurrency or financial-related content.

The impact of CVE-2026-28094 can be severe for organizations using the RexCoin theme. Successful exploitation can lead to unauthorized disclosure of sensitive files, including configuration files containing database credentials or other secrets. It can also enable remote code execution if attackers can include files containing malicious code or leverage other vulnerabilities such as log poisoning. This can result in full server compromise, data breaches, defacement, or use of the compromised server as a pivot point for further attacks. The vulnerability affects the confidentiality, integrity, and availability of affected systems. Organizations running websites with this theme, especially those handling sensitive financial or user data, face significant risks. The lack of authentication requirements and the potential for remote exploitation increase the threat level. Additionally, the reputational damage and regulatory consequences of a breach could be substantial. The threat is particularly relevant to industries relying on WordPress for cryptocurrency, finance, or e-commerce websites.

To mitigate CVE-2026-28094, organizations should first check for updates or patches from ThemeREX and apply them promptly once available. In the absence of an official patch, manual code review and remediation are critical. Developers should ensure that any filename or path parameters used in include or require statements are strictly validated against a whitelist of allowed files or sanitized to prevent directory traversal and arbitrary file inclusion. Employing PHP functions such as realpath() to resolve and verify file paths can help prevent exploitation. Additionally, disabling the allow_url_include directive in PHP configuration reduces risk by preventing remote file inclusion. Web application firewalls (WAFs) can be configured to detect and block suspicious requests attempting to exploit LFI. Regular security audits and monitoring for unusual file access patterns or error logs can help detect exploitation attempts early. Organizations should also consider isolating web server environments and limiting file permissions to reduce the impact of potential exploitation.