CVE-2024-42770 is a stored Cross Site Scripting (XSS) vulnerability identified in the Kashipara Hotel Management System version 1.0, specifically within the /core/signup_user.php file. The vulnerability arises from improper sanitization of the "user_email" parameter, which allows an attacker to inject malicious JavaScript code that is stored persistently on the server. When other users or administrators access the affected page or data, the injected script executes in their browsers, potentially leading to session hijacking, defacement, or other client-side attacks. The vulnerability does not require any authentication to exploit, but user interaction is necessary for the malicious payload to execute. The CVSS 3.1 base score of 4.7 reflects a medium severity, with the vector indicating network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:N), user interaction required (UI:R), and scope changed (S:C). The impact affects integrity (I:L) but not confidentiality or availability. No patches or known exploits are currently reported. This vulnerability is classified under CWE-79, which covers improper neutralization of input during web page generation. The lack of input validation and output encoding in the affected parameter is the root cause. Organizations using this system should be aware of the risk of persistent XSS attacks that can compromise user trust and security.

The primary impact of CVE-2024-42770 is on the integrity of the Kashipara Hotel Management System and the security of its users. Successful exploitation allows attackers to execute arbitrary scripts in the browsers of users who view the injected content, which can lead to session hijacking, credential theft, unauthorized actions performed on behalf of users, or distribution of malware. Although confidentiality and availability are not directly compromised, the integrity breach can facilitate further attacks that may escalate privileges or cause reputational damage. For organizations, this can result in loss of customer trust, regulatory compliance issues, and potential financial losses. Since the vulnerability is in a hotel management system, attackers could target hospitality businesses to gain access to customer data or disrupt operations indirectly. The medium severity score indicates a moderate risk, but the lack of authentication requirement and network accessibility increase the likelihood of exploitation if unmitigated.

To mitigate CVE-2024-42770, organizations should implement strict input validation and output encoding on the "user_email" parameter and any other user-supplied data fields. Specifically, the application should sanitize inputs to remove or neutralize HTML and JavaScript code before storing or rendering them. Employing a robust web application firewall (WAF) with rules to detect and block XSS payloads can provide an additional layer of defense. Developers should adopt secure coding practices such as using context-aware encoding libraries (e.g., OWASP Java Encoder or similar) and frameworks that automatically handle output encoding. Regular security testing, including automated scanning and manual penetration testing focused on XSS, is recommended to identify and remediate similar issues. Since no official patch is currently available, organizations should consider isolating or restricting access to the vulnerable module until a fix is released. User education to recognize suspicious behavior and limiting user privileges can also reduce the impact of exploitation.