CVE-2024-26491 in Media Gallery with Description Module
Summary
by MITRE • 02/22/2024
A cross-site scripting (XSS) vulnerability in the Addon JD Flusity 'Media Gallery with description' module of flusity-CMS v2.33 allows attackers to execute arbitrary web scripts or HTML via a crafted payload injected into the Gallery name text field.
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Analysis
by VulDB Data Team • 04/18/2025
This cross-site scripting vulnerability exists within the flusity-CMS v2.33 platform, specifically affecting the JD Flusity 'Media Gallery with description' module. The flaw represents a classic persistent XSS attack vector where malicious input is not properly sanitized or validated before being rendered back to users. The vulnerability is particularly concerning because it allows attackers to inject malicious scripts through the Gallery name text field, which serves as an entry point for executing arbitrary web scripts or HTML code within the context of other users' browsers. This type of vulnerability falls under CWE-79 which categorizes improper neutralization of input during web page generation, making it a fundamental web application security weakness that has been consistently identified as one of the top ten web application security risks by OWASP.
The technical exploitation of this vulnerability occurs when an attacker crafts a malicious payload containing script code and submits it through the Gallery name field. When other users view the media gallery page, the malicious code executes in their browser context, potentially leading to session hijacking, credential theft, or redirection to malicious sites. The attack vector is particularly dangerous because it leverages the legitimate functionality of the CMS module, making it harder to detect and distinguish from normal user activity. This vulnerability can be exploited across different browser environments and operating systems, as the XSS flaw resides in the server-side processing of user input before it is stored and subsequently displayed.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable sophisticated attacks such as credential harvesting through form grabbing, session manipulation, and redirection to phishing sites. Attackers can leverage this vulnerability to establish persistent access to user sessions, potentially compromising entire user accounts within the CMS environment. The vulnerability also poses risks to the overall integrity of the content management system, as malicious actors can inject content that may damage the reputation of the website or organization using flusity-CMS. From an ATT&CK framework perspective, this vulnerability maps to T1531 which involves the use of unauthorized system access to execute malicious code, and T1071.001 which covers application layer protocol usage for command and control communications.
Mitigation strategies should focus on implementing comprehensive input validation and output encoding mechanisms within the CMS platform. The primary defense involves sanitizing all user inputs, particularly those that are rendered back to users in web pages, through proper encoding techniques such as HTML entity encoding or JavaScript escaping. Additionally, implementing a Content Security Policy (CSP) header can significantly reduce the impact of successful XSS attacks by restricting the sources from which scripts can be loaded. Regular security audits and code reviews should be conducted to identify similar vulnerabilities in other modules of the CMS, while also ensuring that all third-party components are kept up to date with the latest security patches. The vulnerability also highlights the importance of following secure coding practices and implementing proper input validation frameworks that can prevent such injection attacks from occurring in the first place.