WebRehab Super Forms Plugin up to 6.3.316 on WordPress submit_form input validation

Summaryinfo

A vulnerability described as critical has been identified in WebRehab Super Forms Plugin up to 6.3.316. This affects the function submit_form. Executing a manipulation can lead to input validation. This vulnerability is tracked as CVE-2026-17609. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability classified as critical was found in WebRehab Super Forms Plugin up to 6.3.316. This vulnerability affects the function submit_form. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect integrity, and availability. CVE summarizes:

The Super Forms – Drag & Drop Form Builder plugin for WordPress is vulnerable to Arbitrary Directory Deletion in all versions up to, and including, 6.3.316 via the submit_form function. This is due to insufficient validation of attacker-controlled JSON field declarations against the actual form schema, combined with a non-effective ABSPATH guard that dirname() trivially bypasses by stripping the trailing slash. This makes it possible for unauthenticated attackers to recursively delete arbitrary directories on the server, including the WordPress root directory. Exploitation requires that an administrator has enabled the 'Delete files from server after form submissions' setting, though this is a documented and commonly-enabled feature.

The advisory is shared for download at wordfence.com. This vulnerability was named CVE-2026-17609 since 07/27/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 10/08/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• WordPress Plugin

Vendor

• WebRehab

Name

• Super Forms Plugin

Version

• 6.3.316

CPE 2.3info

• 🔒

CPE 2.2info

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Once again VulDB remains the best source for vulnerability data.

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