CVE-2026-1394: WP Quick Contact Us CSRF Vulnerability

CVE-2026-1394 Overview

The WP Quick Contact Us plugin for WordPress is vulnerable to Cross-Site Request Forgery (CSRF) in all versions up to, and including, 1.0. This vulnerability stems from missing nonce validation on the settings update functionality, which enables unauthenticated attackers to modify the plugin's settings through a forged request if they can trick a site administrator into performing an action such as clicking on a malicious link.

Critical Impact

Unauthenticated attackers can manipulate plugin settings via forged requests, potentially redirecting contact form submissions, injecting malicious content, or disrupting site functionality when administrators are tricked into clicking malicious links.

Affected Products

• WP Quick Contact Us plugin for WordPress versions up to and including 1.0

Discovery Timeline

• 2026-02-14 - CVE-2026-1394 published to NVD
• 2026-02-18 - Last updated in NVD database

Technical Details for CVE-2026-1394

Vulnerability Analysis

This Cross-Site Request Forgery vulnerability exists due to the absence of proper nonce validation in the plugin's settings update handler. WordPress nonces are security tokens used to verify that requests originate from the authenticated user's session and are intentional actions rather than forged requests from external sources. Without this validation, the plugin cannot distinguish between legitimate administrative actions and malicious requests crafted by attackers.

The vulnerability is classified under CWE-352 (Cross-Site Request Forgery), which occurs when a web application fails to sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request. The attack requires network access and user interaction, as the administrator must be tricked into clicking a malicious link or visiting an attacker-controlled page while authenticated.

Root Cause

The root cause of this vulnerability is the missing implementation of WordPress nonce verification functions (such as wp_verify_nonce() or check_admin_referer()) within the settings update functionality located at line 228 of wp-quick-contact-us.php. When processing settings updates, the plugin accepts and processes POST requests without validating that the request includes a valid security nonce, making it susceptible to forged cross-site requests.

Attack Vector

The attack vector is network-based and requires user interaction. An attacker would craft a malicious webpage containing a hidden form that submits a POST request to the vulnerable plugin's settings endpoint. The form would contain the attacker's desired settings values. When an authenticated WordPress administrator visits the attacker's page, the malicious form automatically submits, leveraging the administrator's active session to modify the plugin settings without their knowledge or consent.

The attacker could potentially:

• Change contact form recipient email addresses to intercept communications
• Modify form display settings to inject malicious content
• Disable the contact form functionality entirely
• Alter form submission behavior for phishing purposes

Detection Methods for CVE-2026-1394

Indicators of Compromise

• Unexpected changes to WP Quick Contact Us plugin settings
• Contact form emails being delivered to unfamiliar addresses
• Administrator reports of clicking suspicious links prior to configuration changes
• Unusual form behavior or display changes not made by authorized users
• Web server logs showing settings update requests from external referrers

Detection Strategies

• Review WordPress plugin settings audit logs for unauthorized modifications
• Monitor HTTP referrer headers on administrative POST requests for external origins
• Implement Web Application Firewall (WAF) rules to detect CSRF patterns
• Enable SentinelOne's WordPress application monitoring for suspicious administrative actions
• Configure alerts for settings changes outside normal administrative workflows

Monitoring Recommendations

• Enable detailed logging of all plugin configuration changes with timestamp and source IP
• Implement browser security headers including X-Frame-Options and Content-Security-Policy
• Deploy endpoint detection and response (EDR) solutions to monitor administrator workstations
• Review web server access logs for suspicious request patterns targeting the plugin endpoint
• Configure email alerts for any contact form recipient address modifications

How to Mitigate CVE-2026-1394

Immediate Actions Required

• Update WP Quick Contact Us plugin to a patched version if available
• Review current plugin settings for any unauthorized modifications
• Verify contact form recipient email addresses are correct and authorized
• Implement additional WAF rules to block potential CSRF attacks
• Educate administrators about the risks of clicking untrusted links while logged into WordPress

Patch Information

Check the WordPress Plugin Repository for updated versions that address this vulnerability. The Wordfence Vulnerability Analysis provides additional details and remediation guidance. Monitor the plugin's changelog for security updates that implement proper nonce validation.

Workarounds

• Temporarily deactivate the WP Quick Contact Us plugin until a patch is available
• Restrict administrative access to trusted IP addresses only
• Use a WordPress security plugin with CSRF protection capabilities
• Configure server-level restrictions on the settings update endpoint
• Implement HTTP-only administrative sessions with strict referrer checking

The vulnerability requires proper nonce implementation by the plugin developers. In WordPress, this involves adding nonce fields to forms using wp_nonce_field() and validating them server-side with wp_verify_nonce() or check_admin_referer() before processing any settings updates.