CVE-2026-15160 Ninja Forms - Excel Export <= 3.3.6 - Missing Authorization to Authenticated (Subscriber+) XLS Write via Path Traversal

The Ninja Forms - Excel Export plugin for WordPress is vulnerable to Directory Traversal in all versions up to, and including, 3.3.6 via the 'spreadsheetexporttmpname' parameter. This makes it possible for authenticated attackers, with subscriber-level access and above, to write .xls/.xlsx files ...