CVE-2023-34648 in User Registration Login and User Management System
Summary
by MITRE • 06/29/2023
A Cross Site Scripting vulnerability in PHPgurukl User Registration Login and User Management System with admin panel v.1.0 allows a local attacker to execute arbitrary code via a crafted script to the signup.php.
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Analysis
by VulDB Data Team • 01/08/2026
The vulnerability identified as CVE-2023-34648 represents a critical cross site scripting flaw within the PHPgurukl User Registration Login and User Management System version 1.0. This system operates with an administrative panel and user registration functionality, making it a prime target for malicious actors seeking to exploit web application weaknesses. The vulnerability specifically resides in the signup.php endpoint, which processes user registration requests and fails to properly sanitize user input data. The flaw allows attackers to inject malicious scripts that can be executed in the context of other users' browsers, potentially leading to unauthorized access, session hijacking, or data exfiltration. This vulnerability type falls under the CWE-79 category of Cross Site Scripting, which is classified as a fundamental web application security weakness that has been consistently ranked among the top ten web application security risks by the OWASP Top Ten project. The attack vector is particularly concerning as it requires minimal privileges for exploitation, enabling local attackers to craft malicious scripts that can be executed upon user interaction with the vulnerable application.
The technical implementation of this vulnerability stems from inadequate input validation and output encoding practices within the signup.php script. When users submit registration data, the application does not sufficiently sanitize or escape special characters in the input fields, allowing malicious payloads to be stored and subsequently executed. The flaw typically manifests when an attacker submits crafted script code within registration parameters such as username, email, or other user profile fields. Upon successful injection, the malicious script executes in the browser context of any user who views the affected data or interacts with the compromised registration records. The vulnerability can be exploited through various methods including but not limited to javascript payload injection, iframe injection, or other client-side attack vectors that leverage the XSS weakness. This weakness is further exacerbated by the presence of an administrative panel, which means that successful exploitation could potentially lead to privilege escalation or unauthorized access to sensitive administrative functions.
The operational impact of this vulnerability extends beyond simple script execution, creating potential pathways for more sophisticated attacks within the targeted system. Attackers could leverage this vulnerability to steal user session cookies, redirect users to malicious websites, inject malicious content into web pages, or even perform actions on behalf of authenticated users. The presence of an admin panel within the same application increases the potential damage, as successful exploitation could lead to unauthorized administrative access, data manipulation, or complete system compromise. From an attack framework perspective, this vulnerability aligns with techniques described in the MITRE ATT&CK framework under the 'Initial Access' and 'Persistence' phases, where attackers can establish footholds through web application vulnerabilities. The vulnerability could also facilitate credential theft, data exfiltration, or serve as a stepping stone for further reconnaissance and lateral movement within network environments where the application is deployed.
Mitigation strategies for CVE-2023-34648 should focus on implementing robust input validation and output encoding practices throughout the application. Developers must ensure that all user input is properly sanitized and validated before being processed or stored within the system. The implementation of Content Security Policy (CSP) headers can provide additional protection against script execution, while proper output encoding should be enforced for all dynamic content rendered in web pages. Regular security code reviews and automated vulnerability scanning should be conducted to identify similar weaknesses in other application components. The system should also implement proper access controls and authentication mechanisms to limit the impact of potential exploitation attempts. Organizations should consider implementing web application firewalls to detect and block malicious payloads attempting to exploit XSS vulnerabilities. Additionally, regular updates and patches should be applied to ensure that known vulnerabilities are addressed promptly. The vulnerability highlights the importance of following secure coding practices and adhering to security standards such as those outlined in the OWASP Secure Coding Practices and the ISO/IEC 27001 information security management framework. Organizations should also implement monitoring and logging mechanisms to detect potential exploitation attempts and establish incident response procedures to address successful attacks.