CVE-2026-4394
MediumCVSS 6.1Exploitation Probability (EPSS)
Low risk21th percentile - higher than 21% of all known CVEs
Summary
The Gravity Forms plugin for WordPress up to version 2.9.30 has a Stored XSS vulnerability in the Credit Card field's 'Card Type' sub-field. The get_value_entry_detail() method outputs the value without escaping, and get_value_save_entry() accepts unsanitized input. The Card Type field is not rendered on the frontend but the backend accepts it from POST requests. Unauthenticated attackers can inject arbitrary scripts that execute when an admin views the entry in the dashboard.
Risk Assessment
Unauthenticated attackers can execute scripts in the admin panel context, potentially leading to session theft, defacement, or further attacks.
Recommendation
Update the Gravity Forms plugin to version 2.9.31 or later.
Original NVD description (English source)
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.