CVE-2026-121977
Deferred Deferred - Pending Action

Stored XSS in JetFormBuilder WordPress Plugin

Publication date: 2026-11-07

Last updated on: 2026-11-07

Assigner: Wordfence

Description
The JetFormBuilder — Dynamic Blocks Form Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'note (form field whose value is written to post meta `note`)' parameter in all versions up to, and including, 3.6.8 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. Successful exploitation requires a privileged user with the edit_others_posts capability to visit a form URL containing the attacker-created post ID, a delivery step the attacker controls via a crafted phishing link.

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Meta Information

Published
2026-11-07
Last Modified
2026-11-07
Generated
2026-11-07
AI Q&A
2026-11-07
EPSS Evaluated
N/A
NVD
CVE-2026-121977
EUVD
EUVD-2026-119166

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
jetmonsters JetFormBuilder — Dynamic Blocks Form Builder From 0 (inc) to 3.6.8 (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 JetFormBuilder plugin for WordPress. It allows unauthenticated attackers to inject malicious scripts via the 'note' parameter in form fields. The scripts execute when users access infected pages. Exploitation requires a privileged user to visit a crafted link.

Impact Analysis

Attackers could steal user sessions, deface websites, or redirect visitors to malicious sites. Users with edit_others_posts capability may unknowingly trigger the exploit by visiting a phishing link. This could lead to unauthorized data access or loss of trust in the website.

Compliance Impact

This vulnerability could lead to data breaches, violating GDPR (data protection) and HIPAA (health data privacy). Unauthorized script execution may expose sensitive user data, resulting in legal penalties, fines, or reputational damage for organizations handling regulated information.

Mitigation Strategies

Update the JetFormBuilder plugin to the latest version beyond 3.6.8 to patch the vulnerability. If updating is not possible, consider disabling the plugin temporarily until a fix is applied.

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