CVE-2024-27680 in flusity
Summary
by MITRE • 03/04/2024
Flusity-CMS v2.33 is vulnerable to Cross Site Scripting (XSS) in the "Contact form."
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Analysis
by VulDB Data Team • 04/18/2025
The Flusity-CMS version 2.33 contains a cross site scripting vulnerability within its contact form functionality that represents a significant security weakness in the content management system. This vulnerability allows attackers to inject malicious scripts into the contact form inputs, potentially compromising user sessions and enabling unauthorized access to sensitive data. The flaw specifically affects the server-side processing of form submissions where user input is not properly sanitized or validated before being rendered back to users. The vulnerability stems from inadequate input filtering mechanisms that fail to neutralize potentially harmful script tags and executable code within form fields, creating an attack surface that can be exploited by malicious actors. This issue directly violates security best practices for web application development and represents a critical weakness in the application's defense-in-depth strategy.
The technical implementation of this XSS vulnerability occurs when user-provided data from the contact form is directly embedded into web pages without proper context-aware encoding or sanitization. Attackers can craft malicious payloads that exploit the lack of input validation, allowing them to execute scripts in the context of other users' browsers who view the affected content. The vulnerability can be categorized under CWE-79 as "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')" and aligns with ATT&CK technique T1566.001 for "Phishing with Social Engineering". When an authenticated user visits a page containing the malicious script or when administrators view contact form submissions, the injected code executes, potentially stealing session cookies, redirecting users to malicious sites, or performing unauthorized actions on behalf of the victim. The attack vector is particularly concerning because contact forms are typically trusted entry points that users interact with regularly, making them ideal targets for exploitation.
The operational impact of this vulnerability extends beyond simple script execution to encompass potential data breaches, session hijacking, and privilege escalation within the CMS environment. An attacker who successfully exploits this vulnerability could gain access to sensitive information submitted through the contact form, including personal details, business communications, or confidential messages. The vulnerability also poses risks to the overall integrity of the CMS, as successful exploitation could enable attackers to manipulate content, modify user permissions, or even gain administrative access to the system. This weakness undermines the trust model of the content management system and could lead to reputational damage, regulatory compliance violations, and financial losses for organizations relying on Flusity-CMS. The vulnerability affects both end users and administrators who interact with contact form data, creating a broad attack surface that requires immediate remediation.
Mitigation strategies for this XSS vulnerability should focus on implementing comprehensive input validation and output encoding mechanisms throughout the application's data flow. Organizations should implement proper sanitization of all user inputs using context-appropriate encoding techniques such as HTML entity encoding for web page contexts and JavaScript escaping for script contexts. The implementation of Content Security Policy headers can provide additional protection against script execution, while regular security audits and penetration testing should be conducted to identify similar vulnerabilities in other components. Input validation should be enforced at multiple layers including client-side and server-side validation, with proper error handling that does not expose internal system information. Organizations should also consider implementing web application firewalls to detect and block malicious payloads, while ensuring that all CMS components are kept up to date with the latest security patches. Regular security training for developers on secure coding practices and adherence to OWASP top ten guidelines will help prevent similar vulnerabilities from being introduced in future versions of the software. The vulnerability underscores the critical importance of input sanitization and output encoding in preventing cross site scripting attacks, making it essential for organizations to prioritize these security measures in their development lifecycle.