The vulnerability CVE-2026-28067 in ThemeREX Bassein arises from improper validation or control of filenames used in PHP include/require statements. This flaw enables PHP Local File Inclusion, which can be exploited to execute arbitrary code or disclose sensitive information. The issue affects Bassein versions up to 1.0.15. The CVSS v3.1 score is 8.1, indicating high severity with network attack vector, high complexity, no privileges required, no user interaction, and impacts on confidentiality, integrity, and availability.

Successful exploitation of this vulnerability can lead to local file inclusion, allowing attackers to read sensitive files or execute arbitrary code on the affected system. This compromises confidentiality, integrity, and availability of the application and potentially the underlying server environment.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official patch or workaround information is provided, users should monitor ThemeREX advisories for updates. Until a fix is available, restricting access to the vulnerable application and limiting exposure to untrusted networks may reduce risk.