CVE-2026-57379 in FormyChat Plugin
Summary
by MITRE • 07/13/2026
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in WPPOOL FormyChat social-contact-form allows Stored XSS.This issue affects FormyChat: from n/a through <= 2.15.3.
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Analysis
by VulDB Data Team • 07/13/2026
This cross-site scripting vulnerability represents a critical security flaw in the WPPOOL FormyChat plugin that enables stored malicious script execution within web browsers of unsuspecting users. The vulnerability stems from inadequate input sanitization during the web page generation process, specifically when processing user-submitted data for social contact forms. When attackers submit malicious payload content through form fields, the plugin fails to properly neutralize potentially dangerous characters and script tags, allowing these inputs to be stored in the database and subsequently executed whenever the affected pages are rendered to other users.
The technical implementation of this vulnerability aligns with CWE-79 which defines cross-site scripting as a weakness where untrusted data is sent to a web browser without proper validation or encoding. This particular instance demonstrates a stored XSS pattern where malicious scripts persist in the application's database rather than being reflected in response headers. The vulnerability affects all versions of FormyChat up to and including version 2.15.3, indicating that the input sanitization mechanisms were either completely absent or insufficiently implemented throughout the affected release cycle.
The operational impact of this vulnerability presents significant risks to both administrators and end users of websites utilizing the affected plugin. Attackers can leverage this flaw to execute arbitrary JavaScript code in victims' browsers, potentially enabling session hijacking, credential theft, defacement of web pages, or redirection to malicious sites. The stored nature of the vulnerability means that once exploited, malicious payloads remain persistent until manually removed from the database, creating ongoing security risks for all users who encounter the compromised content.
Security mitigations should begin with immediate patching to version 2.15.4 or later where the input sanitization has been properly implemented and tested. Administrators must also implement additional defensive measures including input validation at multiple layers, output encoding for all dynamic content, and regular security audits of plugin components. The vulnerability demonstrates the importance of following secure coding practices as outlined in OWASP Top 10 and NIST guidelines for preventing XSS attacks through proper data sanitization and context-appropriate escaping mechanisms.
Organizations should consider implementing Content Security Policy headers as an additional defense-in-depth measure to limit script execution capabilities even if XSS vulnerabilities persist elsewhere in the application. Regular monitoring of plugin repositories and security advisories remains essential for maintaining awareness of similar vulnerabilities in third-party components. The incident highlights the critical need for comprehensive input validation testing, particularly for web applications handling user-generated content, as recommended by MITRE ATT&CK framework's technique T1203 which addresses the exploitation of input validation weaknesses through malicious script injection attacks.