CVE-2025-48263 in MultiVendorX Plugin
Summary
by MITRE • 05/19/2025
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in MultiVendorX MultiVendorX allows Stored XSS. This issue affects MultiVendorX: from n/a through 4.2.22.
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Analysis
by VulDB Data Team • 07/09/2025
The vulnerability identified as CVE-2025-48263 represents a critical cross-site scripting flaw within the MultiVendorX e-commerce platform that enables stored XSS attacks. This weakness resides in the web page generation process where input validation and sanitization mechanisms fail to properly neutralize malicious user input before it is rendered back to other users. The vulnerability affects all versions of MultiVendorX from the initial release through version 4.2.22, indicating a prolonged period during which the system remained susceptible to this class of attack. The stored nature of this XSS vulnerability means that malicious scripts are permanently stored on the server and executed whenever affected pages are accessed by other users, making it particularly dangerous for e-commerce environments where user-generated content is prevalent.
The technical flaw manifests when user input containing malicious script code is accepted and processed without adequate sanitization or encoding mechanisms. When this data is later retrieved and displayed in web pages, the embedded scripts execute in the context of other users' browsers, potentially allowing attackers to steal session cookies, perform actions on behalf of users, or redirect them to malicious sites. This vulnerability directly maps to CWE-79 which defines Cross-Site Scripting as the improper sanitization of input data that allows attackers to inject executable scripts into web pages viewed by other users. The flaw operates at the application layer where user input flows through the system without proper validation, creating an attack surface that aligns with the ATT&CK technique T1059.001 for command and scripting interpreter, as malicious code can be executed through the browser environment.
The operational impact of this vulnerability extends beyond simple data theft, as it can compromise the entire user base of affected MultiVendorX installations. Attackers can exploit this weakness to hijack user sessions, modify product listings, manipulate transaction data, or even redirect customers to fraudulent websites. The stored nature of the vulnerability means that once exploited, the malicious code persists and affects all users who access the affected pages, making it particularly dangerous for marketplace environments where multiple vendors and customers interact. This type of vulnerability can lead to significant financial losses, reputational damage, and regulatory compliance issues for businesses using the affected platform. The vulnerability affects the core functionality of the e-commerce system by undermining user trust and potentially allowing attackers to manipulate the entire marketplace ecosystem.
Mitigation strategies should focus on implementing comprehensive input validation and output encoding mechanisms throughout the application. Organizations should immediately upgrade to the latest version of MultiVendorX where this vulnerability has been addressed, as version 4.2.23 or later should contain the necessary patches. Additionally, developers should implement proper sanitization of all user inputs using context-appropriate encoding methods such as HTML entity encoding for web content, and ensure that all dynamic content generation follows secure coding practices. The implementation of Content Security Policy headers can provide additional defense-in-depth measures, while regular security testing including automated scanning and manual penetration testing should be conducted to identify similar vulnerabilities. Organizations should also consider implementing Web Application Firewalls and monitoring for suspicious input patterns to detect potential exploitation attempts. The vulnerability underscores the importance of following secure coding standards and maintaining regular security updates as outlined in industry best practices for preventing XSS attacks.