The vulnerability CVE-2026-39553 in Select-Themes WaveRide is classified under CWE-98, indicating improper control of filenames in PHP include/require statements. This flaw allows local file inclusion, which can be exploited remotely over the network without privileges or user interaction, as indicated by the CVSS vector (AV:N/AC:H/PR:N/UI:N). The impact includes high confidentiality, integrity, and availability losses. Affected versions include WaveRide up to 1.4. There is no vendor-provided patch or official remediation level at this time.

Successful exploitation of this vulnerability can lead to local file inclusion, enabling attackers to read sensitive files, execute arbitrary code, or disrupt service, resulting in high impact on confidentiality, integrity, and availability. The CVSS score of 8.1 reflects this high severity. No known exploits in the wild have been reported so far.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should consider restricting access to vulnerable installations, applying web application firewall rules to block suspicious requests, and monitoring for unusual activity related to file inclusion attempts. Avoid exposing the affected application to untrusted networks where possible.