CVE-2026-56071 in Forminator Plugin
Summary
by MITRE • 06/25/2026
Unauthenticated Cross Site Scripting (XSS) in Forminator <= 1.53.1 versions.
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Analysis
by VulDB Data Team • 06/25/2026
This vulnerability represents a critical security flaw in the Forminator plugin for WordPress systems, specifically affecting versions up to and including 1.53.1. The issue manifests as an unauthenticated cross site scripting vulnerability that allows attackers to inject malicious scripts into web pages viewed by users without requiring any authentication credentials. This type of vulnerability falls under the common weakness enumeration CWE-79 which describes improper neutralization of input during web page generation in web applications. The vulnerability exists within the plugin's handling of form data and user inputs, creating an entry point for attackers to execute malicious code in the context of a victim's browser session.
The technical implementation of this XSS flaw occurs when Forminator processes form submissions or displays form-related content without adequate sanitization of user-provided input. Attackers can exploit this by crafting malicious payloads within form fields or parameters that are then rendered on web pages accessible to other users. The vulnerability is particularly dangerous because it requires no authentication, making it easily exploitable by anyone with access to the vulnerable website. This weakness enables attackers to perform various malicious activities including session hijacking, credential theft, defacement of content, and redirection to malicious websites.
The operational impact of this vulnerability extends beyond simple script execution as it provides attackers with persistent access to user sessions and potentially sensitive data. When exploited successfully, the XSS attack can allow threat actors to steal cookies, capture user credentials, modify page content, or redirect users to phishing sites. The vulnerability affects all users of the affected Forminator plugin versions regardless of their authentication status, making it particularly dangerous in environments where multiple users interact with forms. This weakness creates a persistent threat vector that can be leveraged for extended periods without detection, as attackers can maintain access through various session manipulation techniques.
Mitigation strategies for this vulnerability require immediate action including updating to the latest version of Forminator where the XSS flaw has been patched and addressed. System administrators should also implement comprehensive input validation and output encoding practices to prevent similar issues in other components. The security community recommends following defense-in-depth principles by implementing content security policies, regular security audits, and monitoring for suspicious activities within web applications. Additionally, organizations should consider implementing web application firewalls and regular penetration testing to identify potential XSS vulnerabilities before they can be exploited by malicious actors. This vulnerability demonstrates the critical importance of maintaining up-to-date software components and implementing proper input sanitization mechanisms in web applications as outlined in various security frameworks including those referenced in the ATT&CK framework for web application attacks.