CVE-2026-12801
Received Received - Intake

Stored XSS in Ultra Addons for Contact Form 7 WordPress Plugin

Publication date: 2026-08-07

Last updated on: 2026-08-07

Assigner: Wordfence

Description
The Ultra Addons for Contact Form 7 plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Range Slider 'data-label' and 'data-separator' attributes in all versions up to, and including, 3.5.43 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

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Meta Information

Published
2026-08-07
Last Modified
2026-08-07
Generated
2026-08-07
AI Q&A
2026-08-07
EPSS Evaluated
N/A
NVD
CVE-2026-12801
EUVD
EUVD-2026-54365

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
ultra_addons contact_form_7 to 3.5.43 (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) issue in the Ultra Addons for Contact Form 7 WordPress plugin. It allows authenticated attackers with contributor-level access or higher to inject malicious scripts via the Range Slider 'data-label' and 'data-separator' attributes. The flaw exists due to insufficient input sanitization and output escaping in versions up to 3.5.43.

Detection Guidance

Detection requires checking for vulnerable versions of the Ultra Addons for Contact Form 7 plugin. Inspect WordPress installations for plugin versions up to 3.5.43. Use commands like 'wp plugin list' in WP-CLI or check the WordPress admin panel under Plugins. Look for the presence of the plugin and its version.

Impact Analysis

An attacker could exploit this to inject malicious scripts into your WordPress site. When users access the infected pages, the scripts could steal cookies, session tokens, or other sensitive data. It may also allow attackers to perform actions on behalf of users or deface your website.

Compliance Impact

This vulnerability could lead to unauthorized data access or modification, violating GDPR's data protection requirements. For HIPAA, it may compromise protected health information if exploited. Organizations could face fines or penalties for failing to secure user data adequately.

Mitigation Strategies

Immediately update the Ultra Addons for Contact Form 7 plugin to the latest version if available. If no update exists, consider disabling or removing the plugin until a patch is released. Restrict contributor-level and above user roles to minimize attack surface.

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