The vulnerability CVE-2026-28095 affects ThemeREX Marcell theme versions up to 1.2.14. It is caused by improper validation or control of filenames used in PHP include or require statements, enabling PHP Local File Inclusion. This can allow attackers to execute arbitrary local files on the server, leading to high impact on confidentiality, integrity, and availability. The CVSS v3.1 base score is 8.1, reflecting network attack vector, high complexity, no privileges required, no user interaction, and high impact on all three security properties. No patch or vendor advisory is currently available to confirm remediation status.

Successful exploitation of this vulnerability can lead to local file inclusion, allowing attackers to execute arbitrary code or access sensitive files on the server hosting the ThemeREX Marcell theme. This compromises confidentiality, integrity, and availability of the affected system. Given the high CVSS score, the impact is considered severe. There are no known exploits in the wild at this time.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should consider disabling or removing the affected theme version to mitigate risk. Monitor official ThemeREX communications for updates on patches or mitigations.