The vulnerability CVE-2026-28013 in ThemeREX Kratz arises from improper validation of filenames used in PHP include or require statements. This allows an attacker to perform Local File Inclusion (LFI), which can lead to unauthorized file access or code execution within the affected versions (up to 1.0.12). The CVSS 3.1 vector indicates the attack requires network access, has high complexity, no privileges or user interaction, and impacts confidentiality, integrity, and availability at a high level. The vulnerability is publicly disclosed but lacks vendor-provided patch or mitigation details.

Successful exploitation of this vulnerability could allow an attacker to include and execute arbitrary files on the server, potentially leading to full compromise of the affected system's confidentiality, integrity, and availability. This could result in unauthorized data disclosure, data modification, or denial of service. However, no known exploits have been reported in the wild so far.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should consider restricting access to vulnerable endpoints, applying web application firewall (WAF) rules to detect and block suspicious include/require requests, and reviewing server configurations to limit file inclusion risks. Monitor vendor channels for updates and apply official patches once released.