CVE-2021-4232 in Zoo Management System
Summary
by MITRE • 05/26/2022
A vulnerability classified as problematic has been found in Zoo Management System 1.0. Affected is an unknown function of the file admin/manage-ticket.php. The manipulation with the input <script>alert(1)</script> leads to cross site scripting. It is possible to launch the attack remotely.
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Analysis
by VulDB Data Team • 07/15/2026
This vulnerability represents a critical cross site scripting flaw in the Zoo Management System 1.0, specifically within the admin/manage-ticket.php file. The issue stems from inadequate input validation and output sanitization mechanisms that fail to properly handle malicious script content. The vulnerability is classified as CWE-79 - Improper Neutralization of Input During Web Page Generation, which is a fundamental web application security weakness that allows attackers to inject client-side scripts into web pages viewed by other users. The attack vector is remotely exploitable through the manipulation of input parameters containing the payload <script>alert(1)</script>, which demonstrates the classic reflected XSS pattern where malicious code is reflected back to the user's browser.
The technical implementation flaw occurs when user-supplied data enters the application through the manage-ticket.php script without proper sanitization or encoding before being rendered in the web page context. This allows an attacker to inject malicious JavaScript code that executes in the victim's browser context, potentially leading to session hijacking, credential theft, or redirection to malicious sites. The vulnerability affects the administrative interface of the system, which increases the potential impact as attackers could gain elevated privileges or access sensitive management functions. According to ATT&CK framework, this maps to T1531 - Account Access Removal and T1071.001 - Application Layer Protocol: Web Protocols, as it exploits web application vulnerabilities to compromise user sessions.
The operational impact of this vulnerability is significant for organizations using the Zoo Management System 1.0, as it creates a persistent security risk that could be exploited by attackers without requiring any privileged access or specialized tools. Remote exploitation capabilities mean that threat actors can target the system from anywhere on the internet, making it particularly dangerous in environments where administrative interfaces are accessible to external networks. The reflected nature of the XSS attack means that successful exploitation requires social engineering to get victims to click malicious links containing the payload, but once triggered, the vulnerability can be used to compromise user sessions and potentially escalate privileges within the system. Organizations should implement comprehensive input validation and output encoding measures across all web applications, particularly in administrative interfaces where sensitive data processing occurs.
Mitigation strategies should include implementing strict input validation that filters or rejects suspicious characters and patterns commonly associated with XSS attacks, such as script tags and event handlers. The application should employ proper output encoding mechanisms that convert potentially dangerous characters into their safe HTML equivalents before rendering content in web pages. Additionally, organizations should implement Content Security Policy headers to restrict the sources from which scripts can be loaded, providing an additional layer of protection against XSS exploitation. Regular security testing including automated scanning and manual penetration testing should be conducted to identify and remediate similar vulnerabilities throughout the application codebase. The implementation of a web application firewall could provide immediate protection while longer-term fixes are implemented, though this should not be considered a substitute for proper input validation and sanitization at the application level.