CVE-2026-5718

The Drag and Drop Multiple File Upload for Contact Form 7 plugin for WordPress is vulnerable to arbitrary file upload in versions up to, and including, 1.3.9.7. This is due to insufficient file type validation that occurs when custom blacklist types are configured, which replaces the default dangerous extension denylist instead of merging with it, and the wpcf7_antiscript_file_name() sanitization function being bypassed for filenames containing non-ASCII characters. This makes it possible for unauthenticated attackers to upload arbitrary files, such as PHP files, to the server, which can be leveraged to achieve remote code execution. The vulnerability was originally reported by Leonid Semenenko (lsemenenko) and partially patched in version 1.3.9.7. A bypass for the patch was separately discovered and reported by Nguyen Hung (Mitchell).

CWE: CWE-434 ／ 公開 2026年4月17日 ／ 最終更新 2026年6月17日

Drag and Drop Multiple File Upload for Contact Form 7 を 1.3.9.8 以降に更新してください。これで本脆弱性は解消します。

Drag and Drop Multiple File Upload for Contact Form 7 の他の脆弱性を見る →