Gravity Forms <= 2.9.30 - Unauthenticated Stored Cross-Site Scripting via Credit Card 'Card Type' Sub-Field

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Summary

CVECVE-2026-4394
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-08 00:16:05 UTC
Updated2026-04-08 21:26:35 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v3.1 6.1 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS: 0.000840000 probability, percentile 0.244420000 (date 2026-04-14)

Problem Types: CWE-79 | CWE-79 CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary6.1MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
3.1CNADECLARED6.1MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Gravity Forms Gravity Forms affected 2.9.30 semver Not specified

References

ReferenceSourceLinkTags
plugins.trac.wordpress.org/browser/gravityforms/trunk/includes/fields/class-gf-field-cre... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/gravityforms/tags/2.9.25/includes/fields/class-gf-fie... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/gravityforms/tags/2.9.25/includes/fields/class-gf-fie... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/gravityforms/trunk/includes/fields/class-gf-field-cre... [email protected] plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/6f38d7b7-6df6-47a2-a9ba-87ef1... [email protected] www.wordfence.com
docs.gravityforms.com/gravityforms-change-log [email protected] docs.gravityforms.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: tadokun (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-03-18T15:53:51.000ZVendor Notified
CNA2026-04-07T10:47:07.000ZDisclosed
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