CVE-2026-16649
Received Received - Intake

Stored XSS in Gravity Forms WordPress Plugin

Publication date: 2026-09-05

Last updated on: 2026-09-05

Assigner: Wordfence

Description
The Gravity Forms plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Post Body Field Value in all versions up to, and including, 2.10.5 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The exploit survives save-time sanitization because wp_kses_post allows the required HTML tags and attributes, and the client-side tooltip script re-parses the browser-decoded aria-label value as innerHTML while only stripping script elements, leaving onerror and other event-handler attributes fully intact and executable.

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Meta Information

Published
2026-09-05
Last Modified
2026-09-05
Generated
2026-09-05
AI Q&A
2026-09-05
EPSS Evaluated
N/A
NVD
CVE-2026-16649
EUVD
EUVD-2026-71879

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
rocketgenius gravity_forms to 2.10.5 (inc)
rocketgenius gravity_forms From 2.9.18 (inc) to 2.9.29 (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

This vulnerability is a Stored Cross-Site Scripting (XSS) flaw in the Gravity Forms WordPress plugin affecting versions up to 2.10.5. It allows unauthenticated attackers to inject malicious scripts into post body fields. The issue occurs due to insufficient input sanitization and output escaping. Attackers can execute arbitrary web scripts when users access infected pages. The exploit persists because wp_kses_post permits certain HTML tags and attributes, while client-side scripts re-parse aria-label values as innerHTML, leaving event-handler attributes like onerror intact and executable.

Detection Guidance

Check if your Gravity Forms plugin version is up to 2.10.5 or higher. Review form submissions for unusual HTML or JavaScript content in post body fields. Inspect browser console logs for unexpected script executions on form pages.

Impact Analysis

This vulnerability allows attackers to inject malicious scripts into your website. If exploited, it could lead to unauthorized actions on behalf of users, theft of sensitive data like cookies or session tokens, or defacement of your website. Visitors to your site could have their browsers compromised, potentially spreading malware or stealing personal information.

Compliance Impact

This vulnerability could lead to non-compliance with GDPR and HIPAA by exposing user data to unauthorized parties. GDPR requires protecting personal data, and a breach could result in fines. HIPAA mandates safeguarding protected health information, and this flaw could allow unauthorized access. Organizations may face legal penalties and reputational damage if exploited.

Mitigation Strategies

Update Gravity Forms to the latest version immediately. Disable the plugin temporarily if an update is not available. Monitor form submissions for suspicious activity and review user roles with form editing permissions.

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