PHP Local File Inclusion in WaveRide Theme Plugin

PHP Local File Inclusion (LFI) vulnerabilities allow attackers to manipulate file inclusion mechanisms to access unauthorized files on the server. CVE-2026-39553 affects Select-Themes WaveRide through version 1.4, where improper control of filenames in PHP include/require statements (CWE-98) enables attackers to read sensitive files like configuration files, source code, or system files. This vulnerability is particularly dangerous in WordPress environments where theme files have broad access, potentially exposing database credentials, API keys, and other sensitive data that could lead to complete site compromise. Organizations running WaveRide should immediately audit their installations and apply patches, as LFI vulnerabilities often serve as stepping stones to remote code execution and data exfiltration attacks.

While this CVE lacks explicit MITRE ATT&CK mappings, Casky's Claude-powered platform would identify attack patterns associated with CWE-98 exploitation through behavioral analysis of file access attempts and path traversal indicators. Practitioners leveraging Casky's 754 mapped security skills would monitor for reconnaissance activities (T1592 - Gather Victim Host Information), suspicious file system queries, and unusual include/require parameter values in application logs. Extended reasoning capabilities would correlate indicators such as repeated attempts to access /etc/passwd, wp-config.php, or directory traversal sequences (.././..), flagging these as potential LFI exploitation chains. Real-world detections would highlight filename manipulation patterns in web server logs and PHP error logs, enabling security teams to distinguish legitimate theme functionality from malicious file inclusion attempts before attackers escalate to code execution.