CVE-2023-36346 in Codekop
Summary
by MITRE • 06/23/2023
POS Codekop v2.0 was discovered to contain a reflected cross-site scripting (XSS) vulnerability via the nm_member parameter at print.php.
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Analysis
by VulDB Data Team • 01/13/2026
The vulnerability identified as CVE-2023-36346 represents a critical security flaw in POS Codekop v2.0 software, specifically manifesting as a reflected cross-site scripting vulnerability within the print.php script. This type of vulnerability falls under the Common Weakness Enumeration category CWE-79 which defines improper neutralization of input during web page generation as a security weakness. The flaw is particularly concerning as it exists within a point-of-sale system that likely processes sensitive financial transactions and customer data, making it a prime target for malicious actors seeking to exploit the system for unauthorized access or data exfiltration.
The technical implementation of this vulnerability occurs through the nm_member parameter within the print.php endpoint, which fails to properly sanitize or validate user input before incorporating it into dynamically generated web content. When an attacker crafts a malicious payload and injects it through this parameter, the server reflects the malicious script back to the user's browser without adequate output encoding or filtering mechanisms. This creates an environment where the injected JavaScript code executes within the context of the victim's browser session, potentially allowing attackers to hijack user sessions, steal sensitive information, or perform unauthorized actions on behalf of legitimate users.
The operational impact of this vulnerability extends beyond simple script execution as it fundamentally compromises the integrity and confidentiality of the POS system. Attackers could exploit this flaw to access customer payment information, personal identification details, or other sensitive transaction data that flows through the system. The reflected nature of the vulnerability means that the attack vector is typically delivered through social engineering tactics such as phishing emails or malicious links that lure users into executing the crafted payload. This vulnerability directly maps to ATT&CK technique T1566.001 which describes the use of spearphishing attachments to gain initial access to target systems. The compromised system could serve as a foothold for further lateral movement within the network, particularly if the POS system shares network resources with other critical infrastructure.
Mitigation strategies for this vulnerability should include immediate implementation of proper input validation and output encoding mechanisms within the print.php script. The system must sanitize all user-supplied input through strict validation routines and apply appropriate HTML escaping before rendering any dynamic content. Security patches should be deployed to update the POS Codekop software to a version that addresses this specific vulnerability. Additionally, implementing a web application firewall with XSS protection capabilities can provide an additional layer of defense. Organizations should also conduct comprehensive security assessments of their POS systems to identify similar vulnerabilities in other components of the software ecosystem. Regular security training for personnel handling POS systems and monitoring of suspicious user activities can help detect potential exploitation attempts. The vulnerability demonstrates the critical importance of input validation in web applications and highlights the need for robust security measures in financial transaction processing systems where the compromise of a single component can have widespread consequences for both organizations and their customers.