This vulnerability involves improper control of the filename parameter in include or require statements within the Edge-Themes Belletrist PHP application. It allows an attacker to perform Local File Inclusion (LFI), which can lead to unauthorized file access or code execution. The affected versions include all releases up to and including 1.2. The CVSS v3.1 base score is 8.1, indicating high severity, with network attack vector, high attack complexity, no privileges required, no user interaction, and high impact on confidentiality, integrity, and availability.

Successful exploitation can result in an attacker including and executing local files on the server, potentially leading to full system compromise, data disclosure, and service disruption. The high CVSS score reflects significant confidentiality, integrity, and availability impacts. No known exploits in the wild have been reported.

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 restricting the vulnerable functionality if possible and monitor for updates from Edge-Themes regarding patches or mitigations.