CVE-2026-65439

Received Received - Intake

Unauthenticated XSS in Ultimate Addons for Contact Form 7

Publication date: 2026-07-27

Last updated on: 2026-07-27

Assigner: Patchstack

Description

Unauthenticated Cross Site Scripting (XSS) in Ultimate Addons for Contact Form 7 <=3.5.45 versions.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-07-27

Last Modified

2026-07-27

Generated

2026-07-28

AI Q&A

2026-07-28

EPSS Evaluated

N/A

NVD

CVE-2026-65439

EUVD

EUVD-2026-49663

Affected Vendors & Products

Vendor	Product	Version / Range
ultimate_addons	contact_form_7	to 3.5.45 (inc)

Helpful Resources

Exploitability

CWE

KEV

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.

Attack-Flow Graph

Executive Summary

This is an Unauthenticated Cross Site Scripting (XSS) vulnerability affecting Ultimate Addons for Contact Form 7 plugin versions 3.5.45 and below. It allows attackers to inject malicious scripts into web pages viewed by other users without needing authentication.

Detection Guidance

To detect this XSS vulnerability in Ultimate Addons for Contact Form 7 <=3.5.45, inspect web application logs for unusual input patterns or script tags. Manually test forms by submitting payloads like <script>alert(1)</script> and check for reflected or stored XSS responses. Use browser developer tools to monitor network requests for suspicious data handling.

Impact Analysis

An attacker could steal user sessions, deface websites, or redirect users to malicious sites. It may also enable theft of sensitive data like cookies or personal information entered in forms.

Compliance Impact

This XSS vulnerability could lead to unauthorized data access or modification, violating GDPR's data protection requirements and HIPAA's security rules for protected health information.

Mitigation Strategies

Immediately update Ultimate Addons for Contact Form 7 to the latest version. If an update is unavailable, disable the plugin until a patch is released. Implement input validation and output encoding on all user-supplied data. Use a web application firewall to filter malicious requests targeting XSS vectors.

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