CVE-2024-50412 in Conditional Fields for Contact Form 7 Plugin
Summary
by MITRE • 10/29/2024
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Jules Colle Conditional Fields for Contact Form 7 cf7-conditional-fields allows Stored XSS.This issue affects Conditional Fields for Contact Form 7: from n/a through <= 2.4.15.
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Analysis
by VulDB Data Team • 04/07/2026
The vulnerability CVE-2024-50412 represents a critical cross-site scripting flaw in the Jules Colle Conditional Fields for Contact Form 7 plugin, specifically impacting versions through 2.4.15. This stored XSS vulnerability occurs during the web page generation process when user input is improperly neutralized, creating a persistent security risk for websites utilizing the affected plugin. The flaw resides in how the plugin handles conditional field configurations and user-provided data, allowing malicious actors to inject malicious scripts that execute in the context of other users' browsers.
The technical implementation of this vulnerability stems from insufficient input validation and output encoding within the plugin's conditional field processing logic. When administrators configure conditional fields or when users submit data through contact forms, the plugin fails to properly sanitize or escape special characters in the input data before rendering it in web pages. This creates an environment where malicious scripts can be stored and subsequently executed whenever the affected pages are accessed, making it a persistent threat that affects all users who interact with the compromised website. The vulnerability maps directly to CWE-79, which specifically addresses Cross-site Scripting flaws in web applications.
The operational impact of this stored XSS vulnerability is significant and multifaceted, as it can enable attackers to steal session cookies, perform unauthorized actions on behalf of users, redirect victims to malicious sites, or extract sensitive information from the targeted website. Given that Contact Form 7 is one of the most widely used contact form plugins for wordpress, the potential attack surface is extensive, with numerous websites potentially exposed to this vulnerability. Attackers can leverage this flaw to gain persistent access to user sessions, potentially compromising entire websites or user accounts, particularly if administrators or users have elevated privileges. The stored nature of the vulnerability means that the malicious payload remains active even after the initial injection, creating a long-term threat vector.
Mitigation strategies for CVE-2024-50412 should prioritize immediate plugin updates to versions that address the XSS vulnerability, as the vendor has likely released patches to resolve the input sanitization issues. Organizations should implement comprehensive input validation and output encoding mechanisms to prevent similar vulnerabilities in custom code or other plugins. Security monitoring should include regular scanning for vulnerable plugins and implementation of web application firewalls to detect and block malicious script injection attempts. Additionally, administrators should enforce strict input validation on all user-submitted data and consider implementing content security policies to limit the execution of unauthorized scripts. This vulnerability aligns with ATT&CK technique T1566.001 for initial access through malicious inputs and T1071.001 for application layer protocol usage, emphasizing the need for comprehensive security controls across multiple attack vectors.