CVE-2021-47902 in Online Test Management System
Summary
by MITRE • 01/27/2026
Testa Online Test Management System 3.4.7 contains a SQL injection vulnerability that allows attackers to manipulate database queries through the 'q' search parameter. Attackers can inject malicious SQL code in the search field to extract database information, potentially accessing sensitive user or system data.
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Analysis
by VulDB Data Team • 01/27/2026
The vulnerability identified as CVE-2021-47902 affects Testa Online Test Management System version 3.4.7, representing a critical security flaw that exposes the application to unauthorized data access through SQL injection techniques. This vulnerability specifically targets the search functionality of the system, where the 'q' parameter serves as the primary entry point for malicious input manipulation. The flaw exists within the application's input validation mechanisms, allowing attackers to bypass normal query processing and directly interact with the underlying database infrastructure.
The technical implementation of this vulnerability stems from insufficient sanitization of user inputs passed through the search parameter. When users submit queries containing the 'q' parameter, the application fails to properly escape or validate special SQL characters and commands, enabling attackers to inject malicious SQL code directly into the database query execution pipeline. This weakness aligns with CWE-89, which specifically addresses SQL injection vulnerabilities where untrusted data is incorporated into SQL commands without proper escaping or parameterization. The vulnerability creates a direct pathway for attackers to manipulate database operations through crafted input sequences that can alter query logic and extract unauthorized information.
The operational impact of this vulnerability extends beyond simple data extraction, as it provides attackers with the capability to perform comprehensive database enumeration and potentially gain unauthorized access to sensitive user information, system configurations, and other critical data assets. Attackers can leverage this vulnerability to execute administrative commands, modify database contents, or establish persistent access points within the system. The implications include potential data breaches, user privacy violations, and compromise of the entire test management system infrastructure. This vulnerability directly maps to several ATT&CK techniques including T1071.004 for application layer protocol manipulation and T1213.002 for data from information repositories, making it particularly dangerous in environments where sensitive educational or professional testing data resides.
Mitigation strategies for CVE-2021-47902 should prioritize immediate implementation of proper input validation and parameterized queries throughout the application's codebase. Organizations must ensure that all user inputs are properly sanitized and that database interactions utilize prepared statements or parameterized queries to prevent malicious code injection. The recommended approach includes implementing strict input filtering mechanisms that reject or escape special SQL characters, deploying web application firewalls to monitor and block suspicious query patterns, and conducting comprehensive code reviews to identify additional potential injection points. Additionally, regular security updates and patches should be applied to the Testa Online Test Management System to address known vulnerabilities and maintain system integrity. System administrators should also implement monitoring solutions to detect unusual database access patterns that may indicate exploitation attempts, while establishing proper access controls and least privilege principles to limit potential damage from successful attacks.