Critical File Upload Flaw in Ninja Forms (WordPress)
⚠ A critical arbitrary file upload vulnerability has been identified in the Ninja Forms – File Upload Plugin for WordPress, impacting versions up to 3.3.26 and rated CVSS 9.8. The flaw allows unauthenticated attackers to upload malicious files (including .php), bypass validation, and achieve remote code execution. Wordfence validated the report after it was disclosed on January 8, 2026, and the developer issued a complete patch in version 3.3.27 on March 19; administrators should update immediately.
