CVE-2023-33591 in User Registration & Login and User Management System
Summary
by MITRE • 06/21/2023
User Registration & Login and User Management System v1.0 was discovered to contain a cross-site scripting (XSS) vulnerability via the component /admin/search-result.php.
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Analysis
by VulDB Data Team • 01/05/2026
The vulnerability identified as CVE-2023-33591 represents a critical cross-site scripting flaw within the User Registration & Login and User Management System version 1.0. This issue specifically manifests in the administrative component located at /admin/search-result.php, where insufficient input validation and output encoding mechanisms fail to properly sanitize user-supplied data. The vulnerability stems from the application's inability to adequately filter or escape special characters in input fields that are subsequently reflected in the web page output without proper context-aware encoding. This flaw allows malicious actors to inject arbitrary JavaScript code into the application's response, which executes in the context of other users' browsers when they view the affected search results page. The vulnerability is categorized under CWE-79 - Improper Neutralization of Input During Web Page Generation, which is a fundamental weakness in web application security that enables attackers to manipulate the application's behavior through crafted input data.
The operational impact of this XSS vulnerability extends beyond simple data theft or defacement, as it provides attackers with the capability to establish persistent malicious presence within the application environment. An attacker could exploit this vulnerability to steal session cookies, perform unauthorized actions on behalf of authenticated users, redirect victims to malicious sites, or inject malicious scripts that could harvest sensitive information from the application's administrative interface. The attack vector specifically targets the administrative search functionality, which suggests that the vulnerability could be leveraged by attackers who have gained access to the application through other means or by targeting administrative users who interact with the search results page. This presents a significant risk to the confidentiality and integrity of the user management system, potentially allowing attackers to escalate privileges or access sensitive administrative functions that are typically protected from regular users.
Security practitioners should consider this vulnerability in the context of the broader ATT&CK framework, particularly under the T1566 - Phishing and T1059 - Command and Scripting Interpreter tactics. The vulnerability could be exploited as part of a multi-stage attack where initial access is gained through social engineering or other means, followed by exploitation of this XSS flaw to establish a foothold within the application's administrative environment. The recommended mitigation strategies include implementing comprehensive input validation and output encoding mechanisms throughout the application, specifically within the search-result.php component and similar administrative pages. All user-supplied data must be properly sanitized and encoded before being rendered in web responses, with context-appropriate encoding methods such as HTML entity encoding for display contexts and JavaScript escaping for script contexts. Additionally, implementing Content Security Policy headers can provide an additional layer of protection against XSS attacks by restricting the sources from which scripts can be loaded and executed. Regular security testing including automated vulnerability scanning and manual penetration testing should be conducted to identify and remediate similar vulnerabilities across the entire application codebase.