Multiple Page Generator Plugin – MPG <= 4.0.2 - Authenticated (Editor+) Directory Traversal to Limited File Deletion

The Multiple Page Generator Plugin – MPG plugin for WordPress is vulnerable to arbitrary file deletion due to insufficient file path validation in the mpg_upsert_project_source_block() function in all versions up to, and including, 4.0.2. This makes it possible for authenticated attackers, with editor-level access and above, to delete limited files on the server.

An attacker needs Editor access first, so the firewall sees the attempt as traffic from a logged-in account: WordSec's web application firewall inspects request payloads before WordPress loads them. Classes like this one can leave something behind, so the staged malware scanner is the second half: it looks for dropped files and modified code rather than for the request that created them. None of that substitutes for the fix: MPG 4.0.3 closes this, and updating the plugin is the step that ends it.

• Firewall
• Scanner
• Alerts