CVE-2025-6212: Contact Form 7 Ultra Addons XSS Flaw

CVE-2025-6212 Overview

CVE-2025-6212 is a Stored Cross-Site Scripting (XSS) vulnerability in the Ultimate Addons for Contact Form 7 WordPress plugin by Themefic. The flaw affects the Database module in versions 3.5.11 through 3.5.19. Unauthenticated attackers can inject arbitrary JavaScript through unfiltered form field names that are later rendered as JSON column headers by the admin-side DataTables renderer without HTML encoding. Script execution occurs when an administrator views the affected page in the WordPress dashboard.

Critical Impact
Unauthenticated attackers can store malicious scripts that execute in the administrator's browser session, enabling session theft, privilege escalation, and further compromise of WordPress installations.

Affected Products

Themefic Ultimate Addons for Contact Form 7 version 3.5.11
Themefic Ultimate Addons for Contact Form 7 versions 3.5.12 through 3.5.18
Themefic Ultimate Addons for Contact Form 7 version 3.5.19

Discovery Timeline

2025-06-26 - CVE-2025-6212 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-6212

Vulnerability Analysis

The vulnerability is a stored Cross-Site Scripting flaw classified under [CWE-79]. It resides in the Database module of the Ultimate Addons for Contact Form 7 plugin. The plugin stores form field names without sanitization while sanitizing the associated values. When an administrator loads the database view, the ajax_get_table_data() endpoint returns these unfiltered names as JSON column headers. The client-side DataTables renderer in database-pro-main.js injects the headers directly into the Document Object Model (DOM) without applying HTML encoding.

Root Cause

The root cause is a combination of insufficient input sanitization on write and missing output escaping on render. Field names bypass WordPress sanitization functions when stored, and the JavaScript renderer trusts server-supplied JSON values as safe HTML. Neither the server-side PHP handler in database.php nor the client-side JavaScript performs contextual escaping before insertion into the page.

Attack Vector

An unauthenticated attacker submits a Contact Form 7 entry containing malicious JavaScript embedded in a form field name. The payload persists in the plugin's database table. When a WordPress administrator navigates to the Database module view, the AJAX handler returns the payload as a column header. The DataTables renderer inserts the script into the DOM, executing it in the administrator's authenticated session. Successful exploitation requires user interaction from a privileged user, but no attacker authentication is required.

The vulnerability manifests in the interaction between database.php and database-pro-main.js. See the Wordfence Vulnerability Report for additional technical detail.

Detection Methods for CVE-2025-6212

Indicators of Compromise

Contact Form 7 database entries containing HTML tags such as <script>, <img onerror=>, or <svg onload=> in stored field name columns
Unexpected outbound requests from administrator browser sessions to unknown domains after visiting the plugin's Database module page
New or modified WordPress administrator accounts created shortly after Database module access
Anomalous AJAX responses from ajax_get_table_data() containing JavaScript payloads in column header fields

Detection Strategies

Inspect the plugin's database tables for stored field names containing HTML or JavaScript syntax rather than plain text identifiers
Deploy a Web Application Firewall (WAF) rule that inspects Contact Form 7 submissions for script tags in field name parameters
Monitor WordPress admin session activity for unexpected script execution in the wp-admin context

Monitoring Recommendations

Enable WordPress audit logging to record plugin database reads and administrator page visits
Aggregate WordPress access logs and browser Content Security Policy (CSP) violation reports in a centralized SIEM for correlation
Alert on plugin version enumeration attempts and repeated submissions to Contact Form 7 endpoints from single IP addresses

How to Mitigate CVE-2025-6212

Immediate Actions Required

Update Ultimate Addons for Contact Form 7 to a version later than 3.5.19 that includes the fix from WordPress Changeset 3316177
Audit existing plugin database entries and purge any records containing HTML or JavaScript in field name columns
Force password resets and session invalidation for all WordPress administrator accounts that accessed the Database module during the exposure window
Review WordPress user tables for unauthorized administrator accounts and remove any that were not provisioned by legitimate administrators

Patch Information

The vendor addressed the vulnerability in the plugin repository. Details of the code change are available in the WordPress Plugin Changeset. Site owners should apply the update through the WordPress admin update mechanism or by manually replacing the plugin files from the WordPress Plugin Developer Page.

Workarounds

Deactivate the Ultimate Addons for Contact Form 7 plugin until the patched version can be installed
Restrict access to the wp-admin Database module page through server-level access control lists or IP allowlisting
Deploy a Content Security Policy (CSP) header that blocks inline script execution on WordPress admin pages
Configure a WAF rule to strip HTML tags from Contact Form 7 field name parameters at the network perimeter

bash

# Configuration example: WordPress CLI update command
wp plugin update ultimate-addons-for-contact-form-7 --version=latest
wp plugin get ultimate-addons-for-contact-form-7 --field=version