CVE-2026-4394
Received Received - Intake
Stored XSS in Gravity Forms Credit Card Field Allows Admin Attack

Publication date: 2026-04-08

Last updated on: 2026-04-08

Assigner: Wordfence

Description
The Gravity Forms plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Credit Card field's 'Card Type' sub-field (`input_<id>.4`) in all versions up to, and including, 2.9.30. This is due to the `get_value_entry_detail()` method in the `GF_Field_CreditCard` class outputting the card type value without escaping, combined with `get_value_save_entry()` accepting and storing unsanitized user input for the `input_<id>.4` parameter. The Card Type field is not rendered on the frontend form (it is normally derived from the card number), but the backend submission parser blindly accepts it if included in the POST request. This makes it possible for unauthenticated attackers to inject arbitrary web scripts that execute when an administrator views the form entry in the WordPress dashboard.
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Meta Information
Published
2026-04-08
Last Modified
2026-04-08
Generated
2026-06-16
AI Q&A
2026-04-08
EPSS Evaluated
2026-06-14
NVD
CVE-2026-4394
EUVD
EUVD-2026-19990
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
rocketgenius gravity_forms to 2.9.30 (inc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
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Executive Summary

The Gravity Forms plugin for WordPress has a Stored Cross-Site Scripting (XSS) vulnerability in the Credit Card field's 'Card Type' sub-field (input_<id>.4) in all versions up to and including 2.9.30.

This occurs because the method get_value_entry_detail() in the GF_Field_CreditCard class outputs the card type value without escaping it, and get_value_save_entry() accepts and stores unsanitized user input for this parameter.

Although the Card Type field is not shown on the frontend form (it is normally derived from the card number), the backend submission parser accepts it if included in a POST request.

This allows unauthenticated attackers to inject arbitrary web scripts that execute when an administrator views the form entry in the WordPress dashboard.

Impact Analysis

This vulnerability can allow unauthenticated attackers to execute arbitrary scripts in the context of the WordPress dashboard when an administrator views a maliciously crafted form entry.

Such script execution can lead to compromise of administrator accounts, theft of sensitive information, or further attacks on the WordPress site.

Because the attack requires only a specially crafted POST request and no authentication, it poses a significant risk to site security.

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