CVE-2026-15983
HighCVSS 8.1Exploitation Probability (EPSS)
Low risk43th percentile - higher than 43% of all known CVEs
Summary
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.
Risk Assessment
An attacker with Subscriber-level access can completely delete the WordPress installation, leading to full site takedown and potential remote code execution if critical files such as `wp-config.php` are removed.
Recommendation
Immediately update the Super Forms plugin to the latest patched version. Also restrict user privileges and monitor logs for unusual AJAX requests.
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-2026-14894Critical
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.
Original NVD description (English source)
The Super Forms – Drag & Drop Form Builder plugin for WordPress is vulnerable to Arbitrary File/Directory Deletion in all versions up to, and including, 6.3.316. This is due to the `super_save_form` AJAX handler performing no capability check — allowing Subscriber-level authenticated users to create or modify Super Forms and enable the `file_upload_submission_delete` setting — combined with the `super_submit_form` handler's `submit_form` function passing the attacker-controlled `files[].subdir` value from `$_POST['data']` directly into `SUPER_Common::delete_dir()` without sanitization, and a trivially bypassed `ABSPATH` guard that a `subdir` value of `wp-config.php` defeats because `dirname(realpath(ABSPATH . $subdir))` resolves to the WordPress root while the naive `ABSPATH !== $dir` string check fails to match due to a trailing-slash mismatch. This makes it possible for authenticated attackers, with Subscriber-level access and above, to recursively delete arbitrary files and directories on the server, up to and including the entire WordPress installation, resulting in full site takedown and potential remote code execution if critical files such as `wp-config.php` are removed and the site is subsequently re-installed by another party.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS