CVE-2023-36256 in Online Examination System Project
Summary
by MITRE • 07/07/2023
The Online Examination System Project 1.0 version is vulnerable to Cross-Site Request Forgery (CSRF) attacks. An attacker can craft a malicious link that, when clicked by an admin user, will delete a user account from the database without the admin's consent. The email of the user to be deleted is passed as a parameter in the URL, which can be manipulated by the attacker. This could result in a loss of data.
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Analysis
by VulDB Data Team • 01/12/2026
The Online Examination System Project version 1.0 presents a critical Cross-Site Request Forgery vulnerability that compromises the integrity and confidentiality of user accounts within the administrative environment. This vulnerability stems from insufficient validation of request origins and lack of proper anti-CSRF mechanisms in the web application's authentication and authorization framework. The flaw allows malicious actors to exploit the trust relationship between the web application and its authenticated users, specifically targeting administrative accounts that possess elevated privileges for user management operations. The vulnerability manifests when an attacker crafts a malicious hyperlink containing specific parameters that, upon execution by an authenticated administrator, triggers unauthorized account deletion operations. The system's design fails to implement robust session management controls and request verification mechanisms that would normally prevent unauthorized operations from being executed on behalf of legitimate users.
The technical implementation of this vulnerability exploits the absence of anti-CSRF tokens or similar protective measures in the application's request processing pipeline. The user email parameter is directly passed through the URL query string, making it susceptible to manipulation by attackers who can construct malicious payloads that appear legitimate to the web application. This design pattern violates fundamental security principles outlined in the OWASP Top Ten Project and represents a classic CSRF attack vector where the attacker leverages the victim's authenticated session to perform unauthorized actions. The vulnerability operates at the application layer and can be classified under CWE-352, which specifically addresses Cross-Site Request Forgery flaws in web applications. The system's failure to validate the origin of requests or implement proper token-based authentication mechanisms creates an exploitable gap in the security architecture that directly impacts the system's integrity and availability.
The operational impact of this vulnerability extends beyond simple data loss, as it represents a significant threat to the overall security posture of the examination system. Administrative users who click on malicious links could unknowingly execute destructive operations that result in permanent user account removal from the database, potentially affecting legitimate students and faculty members. The consequences include unauthorized data modification, loss of user credentials, disruption of examination processes, and potential compromise of sensitive academic information. Attackers could exploit this vulnerability to systematically remove user accounts, disrupt access to examination systems, or create confusion within the administrative environment. The vulnerability also opens potential pathways for further attacks, as compromised administrative accounts could provide access to additional system resources or facilitate more sophisticated attacks within the network infrastructure. This type of vulnerability can be mapped to ATT&CK technique T1566.001 which covers credential harvesting through social engineering and manipulation of web applications.
Mitigation strategies for this vulnerability must address the core architectural flaws in the application's security implementation. The primary recommendation involves implementing robust anti-CSRF token mechanisms that are generated per session and validated on each request requiring state changes. The system should enforce strict input validation and parameter sanitization to prevent URL-based manipulation of critical operations. Additionally, the application should implement proper session management controls including secure cookie attributes, session timeout mechanisms, and request origin verification. Security headers such as Content Security Policy and SameSite cookie attributes should be configured to prevent cross-site request forgery attacks. The system should also implement proper logging and monitoring for administrative operations to detect unauthorized account modifications. Organizations should conduct comprehensive security testing including penetration testing and code reviews to identify similar vulnerabilities across the application stack. The implementation of these controls aligns with NIST SP 800-53 security controls and aligns with the principle of least privilege in access control implementations. Regular security updates and vulnerability assessments should be conducted to prevent similar issues from emerging in future system versions.