CVE-2026-6670: Path Traversal in Media Sync WordPress Plugin

An attacker exploiting this Path Traversal vulnerability could read arbitrary files on the server. This includes potentially sensitive configuration files, database credentials, or other application data. While the vulnerability requires authentication (Author access or higher), this is a relatively low barrier to entry for many WordPress installations. Successful exploitation could lead to information disclosure, and in some cases, could be a stepping stone for further attacks, such as gaining shell access if sensitive credentials are exposed. The blast radius is limited to the server hosting the WordPress instance and the files accessible by the attacker.

1. 予約済み2026-04-20
2. 公開日2026-05-14

The primary mitigation for CVE-2026-6670 is to upgrade the Media Sync plugin to version 1.5.0 or later. If upgrading is not immediately feasible due to compatibility issues or testing requirements, consider implementing a Web Application Firewall (WAF) rule to block requests containing directory traversal sequences (e.g., ../) in the subdir and mediaitems parameters. Additionally, restrict file upload permissions to the intended uploads directory. After upgrading, verify the fix by attempting to access a file outside the uploads directory via the vulnerable parameters; the request should be denied.