CVE-2024-29102 in Extensions for CF7 Plugin
Summary
by MITRE • 03/19/2024
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in HasThemes Extensions For CF7 allows Stored XSS.This issue affects Extensions For CF7: from n/a through 3.0.6.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 01/28/2026
This vulnerability represents a critical cross-site scripting flaw that enables attackers to execute malicious scripts within the context of a victim's browser session. The issue specifically resides in the HasThemes Extensions For CF7 plugin, which is designed to enhance contact form functionality within wordpress environments. The vulnerability manifests as improper neutralization of input during web page generation, creating an avenue for persistent script injection attacks that can compromise user sessions and data integrity.
The technical flaw occurs when the plugin fails to adequately sanitize user input before incorporating it into dynamically generated web pages. This allows malicious actors to inject malicious javascript code through contact form submissions or other input fields that are then stored within the application's database. The stored nature of this vulnerability means that the malicious payload persists and executes whenever the affected page is accessed, making it particularly dangerous as it can affect multiple users over time. This weakness directly maps to CWE-79, which describes the improper neutralization of input during web page generation, and aligns with ATT&CK technique T1531 for establishing persistent access through web application vulnerabilities.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable attackers to steal user sessions, modify content, redirect users to malicious sites, or even escalate privileges within the affected wordpress environment. The vulnerability affects all versions of the Extensions For CF7 plugin up to and including version 3.0.6, creating a substantial attack surface across numerous wordpress installations. Attackers can leverage this flaw to gain unauthorized access to sensitive information, manipulate website content, or establish backdoor access points that persist across system reboots.
Mitigation strategies should prioritize immediate patching of the affected plugin to version 3.0.7 or later, which contains the necessary security fixes. Organizations should also implement input validation and output encoding measures at multiple levels including application firewalls, web application firewalls, and server-side sanitization. Regular security audits and penetration testing should be conducted to identify similar vulnerabilities in other plugins or components. Network segmentation and monitoring solutions should be deployed to detect anomalous traffic patterns that may indicate exploitation attempts. Additionally, implementing content security policies and regularly updating all wordpress core files and plugins helps reduce the overall attack surface and provides defense-in-depth measures against similar vulnerabilities.