The vulnerability CVE-2026-28117 affects the axiomthemes smart SEO plugin for PHP, specifically versions up to 2.9. It arises from improper control over filenames used in include or require statements, resulting in PHP Local File Inclusion. This can allow an attacker to include unintended files from the local filesystem, potentially leading to code execution or disclosure of sensitive information. The vulnerability is remotely exploitable over the network without privileges or user interaction, but requires high attack complexity. The CVSS vector indicates high confidentiality, integrity, and availability impact.

Successful exploitation of this vulnerability can lead to full compromise of the affected system by allowing an attacker to execute arbitrary code or access sensitive files. The high CVSS score reflects the critical impact on confidentiality, integrity, and availability. However, no known exploits have been reported in the wild to date.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no patch or official fix information is available, users should monitor vendor communications for updates. Until a fix is released, consider restricting access to the affected plugin and applying any available workarounds recommended by the vendor.