This vulnerability in AncoraThemes Lettuce arises from improper validation of filenames used in PHP include or require statements, leading to PHP Local File Inclusion. Affected versions include all releases up to and including 1.1.7. The issue allows an attacker to include local files on the server, which can lead to arbitrary code execution or disclosure of sensitive information. The CVSS 3.1 base score is 8.1, reflecting network attack vector, high attack complexity, no privileges required, no user interaction, unchanged scope, and high impact on confidentiality, integrity, and availability.

Successful exploitation could allow an unauthenticated remote attacker to include and execute local files on the server running the vulnerable Lettuce version. This can lead to full compromise of the affected system, including data disclosure, code execution, and denial of service. The high CVSS score reflects the critical nature of these impacts.

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, applying web application firewall rules to block malicious requests targeting file inclusion, and monitoring for suspicious activity related to file inclusion attempts. Do not rely on generic mitigations without vendor confirmation.