CVE-2026-12477
Received Received - Intake

Stored XSS in Gravity Booster – Styles & Layouts for Gravity Forms WordPress Plugin

Publication date: 2026-08-16

Last updated on: 2026-08-16

Assigner: Wordfence

Description
The Gravity Booster – Styles & Layouts for Gravity Forms plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 5.26 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with editor-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.

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Meta Information

Published
2026-08-16
Last Modified
2026-08-16
Generated
2026-08-16
AI Q&A
2026-08-16
EPSS Evaluated
N/A
NVD
CVE-2026-12477
EUVD
EUVD-2026-59856

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
gravity_forms gravity_booster to 5.26 (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 Booster – Styles & Layouts for Gravity Forms plugin for WordPress has a stored Cross-Site Scripting (XSS) vulnerability due to insufficient input sanitization and output escaping in admin settings. This allows authenticated attackers with editor-level permissions or higher to inject malicious scripts into pages. The vulnerability only affects multi-site installations or those where unfiltered_html has been disabled.

Detection Guidance

This vulnerability requires checking WordPress installations for the Gravity Booster plugin versions up to 5.26. Inspect plugin files for unsanitized admin settings inputs and review stored scripts in pages. No specific commands are provided in the context.

Impact Analysis

If exploited, this vulnerability could allow attackers to inject malicious scripts into your WordPress site. These scripts could steal user data, hijack sessions, or deface your website. Since it requires editor-level access, the risk is limited to users with those permissions unless unfiltered_html is disabled.

Compliance Impact

This vulnerability could lead to unauthorized access to user data, which may violate GDPR and HIPAA compliance requirements. GDPR mandates protecting personal data, while HIPAA requires safeguarding protected health information. A successful XSS attack could result in data breaches, leading to legal penalties and reputational damage.

Mitigation Strategies

Update the Gravity Booster plugin to the latest version beyond 5.26. Ensure input sanitization is enforced in admin settings and verify that unfiltered_html is enabled. Restrict editor-level permissions to trusted users only.

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