CVE-2024-50800 in Smart4Web
Summary
by MITRE • 11/15/2024
Cross Site Scripting vulnerability in M2000 Smart4Web before v.5.020241004 allows a remote attacker to execute arbitrary code via the error parameter in URL
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Analysis
by VulDB Data Team • 02/26/2025
This cross site scripting vulnerability exists in M2000 Smart4Web software prior to version 5.020241004 and represents a critical security flaw that enables remote attackers to execute arbitrary code through manipulation of the error parameter in URL requests. The vulnerability stems from inadequate input validation and sanitization mechanisms within the web application's error handling subsystem, where user-supplied data is directly reflected in HTTP responses without proper encoding or filtering. This allows malicious actors to inject malicious scripts that can be executed in the context of a victim's browser session, potentially leading to complete compromise of user sessions and sensitive data exposure.
The technical implementation of this vulnerability aligns with CWE-79, which describes cross-site scripting flaws where web applications fail to properly validate or encode user-controllable data. Attackers can exploit this by crafting malicious URLs containing script payloads in the error parameter, which when processed by the vulnerable application, get executed in the victim's browser. The attack vector specifically targets the web application's error handling mechanism, where error messages are generated and displayed without adequate sanitization of input parameters. This creates a persistent XSS vulnerability that can be leveraged for session hijacking, credential theft, and other malicious activities that require execution in the victim's browser context.
The operational impact of this vulnerability extends beyond simple script execution as it provides attackers with the capability to perform session manipulation and data exfiltration attacks. When exploited, the vulnerability can lead to unauthorized access to sensitive information, modification of web content, and potential lateral movement within the network if the compromised user has elevated privileges. The remote nature of the attack means that exploitation can occur from any location without requiring physical access to the system, making it particularly dangerous for web-based applications that handle sensitive data. This vulnerability directly maps to several ATT&CK techniques including T1566.001 for credential access through social engineering and T1059.007 for script execution via web shells.
Mitigation strategies should focus on implementing comprehensive input validation and output encoding mechanisms throughout the application's error handling pathways. Organizations must ensure that all user-supplied data, particularly parameters used in error messages, undergo proper sanitization before being processed or displayed. The most effective remediation involves upgrading to M2000 Smart4Web version 5.020241004 or later, which includes proper input validation and encoding controls. Additionally, implementing Content Security Policy headers, using secure coding practices for input validation, and conducting regular security assessments can significantly reduce the risk of exploitation. Network monitoring should be enhanced to detect suspicious URL patterns containing potential XSS payloads, and regular security training for developers should emphasize proper input handling and output encoding techniques to prevent similar vulnerabilities in future implementations.