CVE-2026-14894
CriticalCVSS 9.8Exploitation Probability (EPSS)
Low risk41th percentile - higher than 41% of all known CVEs
Summary
The Super Forms – Drag & Drop Form Builder plugin for WordPress up to version 6.3.313 is vulnerable to arbitrary file upload via the submit_form function. Missing file type validation and capability checks in the nopriv AJAX handler allow unauthenticated attackers to upload executable files, leading to remote code execution. The nonce protection is easily bypassed using the separate super_create_nonce endpoint that generates a valid nonce and session cookie.
Risk Assessment
The organization risks complete server compromise through remote code execution by an unauthenticated attacker, potentially leading to data theft, malware installation, or full site takeover.
Recommendation
Immediately update the Super Forms plugin to the latest available version. If an update is not possible, temporarily disable the plugin until a patch is released.
Other vulnerabilities in Super Forms – Drag & Drop Form Builder
See all- CVE-2026-17196High
The Super Forms – Drag & Drop Form Builder plugin for WordPress up to version 6.3.316 is vulnerable to Unrestricted File Type Upload via the upload_files function. Missing file type validation allows authenticated attackers with Subscriber-level access and above to upload executable files, leading to remote code execution. The attack requires poisoning _super_elements post meta via the super_save_form AJAX handler, which lacks capability and nonce checks, and then uploading via super_upload_files without authentication.
- CVE-2026-15983High
The Super Forms – Drag & Drop Form Builder plugin for WordPress up to version 6.3.316 is vulnerable to arbitrary file and directory deletion. The vulnerability stems from a missing capability check in the `super_save_form` AJAX handler, allowing Subscriber-level users to create or modify forms and enable the `file_upload_submission_delete` setting, combined with the `submit_form` function passing the attacker-controlled `files[].subdir` value directly to `SUPER_Common::delete_dir()` without sanitization. The `ABSPATH` guard can be trivially bypassed by using a `subdir` value of `wp-config.php`, enabling recursive deletion of files and directories on the server, up to the entire WordPress installation.
Original NVD description (English source)
The Super Forms – Drag & Drop Form Builder plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 6.3.313 via the submit_form function. This is due to missing file type validation and the absence of any capability check on the submit_form nopriv AJAX handler, whose only barrier is a session nonce freely obtainable by unauthenticated visitors via a separate nopriv endpoint. This makes it possible for unauthenticated attackers to upload files that may be executable, which makes remote code execution possible. The nonce requirement is trivially bypassed because the super_create_nonce nopriv AJAX action allows any unauthenticated visitor to mint a valid sf_nonce and session cookie in a single prior request, reducing exploitation to two unauthenticated HTTP requests.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS