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CVE-2025-15637 – Unauthenticated Local File Inclusion – Shuffle WordPress Theme (Edge Themes) ≤ 1.8

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Summary

CVE-2025-15637 is an unauthenticated Local File Inclusion (LFI) vulnerability in the Shuffle WordPress theme, developed by Edge Themes, affecting versions up to and including 1.8. The theme fails to properly control the filename used in a PHP include/require statement, allowing unauthenticated attackers to include and execute arbitrary local files on the server. The flaw carries a High severity rating (CVSS 8.1).

Technical details

  • Root cause: Improper Control of Filename for Include/Require Statement in PHP Program (CWE-98).
  • Trigger conditions: No authentication is required to reach the vulnerable code path; an attacker can supply a crafted filename/path value that is passed unsanitized into a PHP file inclusion function.
  • Attack vector: Network — exploitable remotely over HTTP(S) against any site running the vulnerable theme.
  • Impact: Successful exploitation can lead to disclosure of arbitrary local files and, depending on server configuration (e.g., availability of writable log files, uploaded files, or PHP wrappers), execution of arbitrary PHP code, resulting in high impact to confidentiality, integrity, and availability.

Affected software

  • Shuffle WordPress theme (Edge Themes) — all versions up to and including 1.8.

Severity

  • CVSS v3.1 Base Score: 8.1 (High)
  • Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Mitigation and recommended actions

  • Immediate: Update the Shuffle WordPress theme to version 1.9 or later, which resolves the vulnerability.
  • If no patch can be applied immediately: Restrict or disable public access to the theme until it can be updated, apply a web application firewall rule to block path traversal/LFI-style parameters, and audit server logs for suspicious file-inclusion attempts.

References

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