CVE-2023-6433 in Online Inventory Manager
Summary
by MITRE • 11/30/2023
A vulnerability has been discovered in BigProf Online Invoicing System 2.6, which does not sufficiently encode user-controlled input, resulting in persistent XSS through /inventory/suppliers_view.php, in the FirstRecord parameter. Exploitation of this vulnerability could allow an attacking user to store dangerous JavaScript payloads on the system that will be triggered when the page loads.
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Analysis
by VulDB Data Team • 12/21/2023
The vulnerability identified as CVE-2023-6433 resides within the BigProf Online Invoicing System version 2.6, specifically targeting the /inventory/suppliers_view.php endpoint where the FirstRecord parameter fails to properly sanitize user input. This represents a critical security flaw that enables persistent cross-site scripting attacks, allowing malicious actors to inject and execute arbitrary JavaScript code within the context of the victim's browser. The vulnerability stems from inadequate input validation and output encoding mechanisms that fail to properly escape special characters in user-supplied data before rendering it within the web application's response. The flaw specifically affects the supplier view functionality where the FirstRecord parameter is processed without sufficient sanitization, creating a persistent XSS vector that can be exploited across multiple user sessions.
This vulnerability operates under the CWE-79 classification as a cross-site scripting weakness, where the application fails to properly encode output that contains user-controllable data. The persistent nature of this XSS flaw means that malicious payloads injected through the FirstRecord parameter will remain stored within the application's database or session storage, executing automatically whenever the affected page is accessed by any user with appropriate privileges. The attack vector leverages the principle of insufficient output encoding, which is a fundamental requirement for preventing XSS attacks according to the OWASP Top Ten and the Web Application Security Consortium guidelines. The vulnerability allows for a wide range of malicious activities including session hijacking, credential theft, redirection to malicious sites, and execution of arbitrary code within the victim's browser context.
The operational impact of CVE-2023-6433 extends beyond simple data theft or session manipulation, as it can lead to complete system compromise when combined with other attack vectors. An attacker could leverage this vulnerability to establish persistent backdoors within the invoicing system, potentially gaining access to sensitive financial data, customer information, and business records. The persistent nature of the flaw means that even after initial exploitation, the malicious code continues to execute without requiring repeated user interaction, making it particularly dangerous for enterprise environments where multiple users access the same system. The vulnerability can be exploited through the standard ATT&CK technique of initial access via web application attacks, potentially leading to privilege escalation and lateral movement within the network. Organizations utilizing this invoicing system face significant risk of data breaches, regulatory compliance violations, and potential financial losses due to unauthorized access to business-critical information.
Mitigation strategies for CVE-2023-6433 must focus on implementing robust input validation and output encoding mechanisms throughout the application's codebase, particularly for the FirstRecord parameter in the suppliers_view.php script. The most effective immediate solution involves implementing proper HTML entity encoding for all user-controllable inputs before rendering them in the web response, which directly addresses the CWE-79 vulnerability. Organizations should also implement Content Security Policy headers to limit the execution of unauthorized scripts and deploy web application firewalls to detect and block malicious payloads. The system administrators should ensure that all user inputs are properly validated against expected data types and ranges, while implementing proper output encoding for all dynamic content. Additionally, regular security audits and code reviews should be conducted to identify similar vulnerabilities in other parts of the application, as this flaw may indicate broader issues with input sanitization practices within the BigProf Online Invoicing System. The vulnerability also highlights the importance of keeping software components updated, as this specific version 2.6 of the invoicing system likely contains multiple other security weaknesses that could be exploited in combination with the XSS flaw.