CVE-2026-2158 identifies a SQL injection vulnerability in the code-projects Student Web Portal version 1.0, specifically within the /check_user.php script. The vulnerability arises from improper sanitization or validation of the Username parameter, allowing an attacker to inject arbitrary SQL code. This injection can be performed remotely without requiring authentication or user interaction, making exploitation straightforward. The vulnerability impacts the confidentiality, integrity, and availability of the underlying database by potentially enabling unauthorized data retrieval, modification, or deletion. The CVSS 4.0 base score is 6.9 (medium), reflecting the ease of exploitation (low attack complexity), no privileges required, and no user interaction needed, but with limited scope and impact on the system. No patches or known exploits are currently documented, indicating that the vulnerability may be newly disclosed or under limited active exploitation. The Student Web Portal is likely used by educational institutions to manage student information, making the data sensitive and critical. The lack of authentication requirement and remote attack vector increase the urgency for mitigation. The vulnerability underscores the importance of secure coding practices, particularly input validation and the use of parameterized queries to prevent SQL injection attacks.

The primary impact of CVE-2026-2158 is the potential compromise of sensitive student data stored in the backend database of the Student Web Portal. Successful exploitation could allow attackers to extract confidential information such as personal details, academic records, or login credentials. Additionally, attackers might alter or delete data, disrupting the integrity and availability of the portal's services. This could lead to operational downtime, loss of trust, and regulatory compliance issues for educational institutions. Since the attack requires no authentication and can be performed remotely, the attack surface is broad, increasing the likelihood of exploitation if the system is exposed to the internet. Although no active exploits are known, the vulnerability presents a significant risk to organizations relying on this software, especially those with limited security monitoring or patch management capabilities.

To mitigate CVE-2026-2158, organizations should immediately review and update the /check_user.php script to implement strict input validation and sanitization for the Username parameter. The preferred approach is to refactor the code to use parameterized queries or prepared statements to prevent SQL injection. If source code modification is not immediately feasible, deploying a web application firewall (WAF) with rules to detect and block SQL injection attempts targeting the Username parameter can provide temporary protection. Additionally, organizations should conduct thorough security assessments of the Student Web Portal and related systems, monitor database logs for suspicious queries, and restrict external access to the portal where possible. Regular backups of the database should be maintained to enable recovery in case of data tampering. Finally, organizations should track vendor updates or patches and apply them promptly once available.