CVE-2026-0803 is an SQL injection vulnerability identified in the PHPGurukul Online Course Registration System, specifically in versions 3.0 and 3.1. The vulnerability resides in the /enroll.php file, where several input parameters—studentregno, Pincode, session, department, level, course, and sem—are not properly sanitized or validated before being used in SQL queries. This lack of input validation allows an attacker to inject arbitrary SQL commands remotely, without requiring authentication or user interaction. The vulnerability could enable attackers to retrieve, modify, or delete sensitive data stored in the backend database, such as student records, course enrollments, or administrative information. The CVSS v4.0 score of 5.3 reflects a medium severity, considering the attack vector is network-based with low attack complexity and no privileges or user interaction needed, but with limited impact on confidentiality, integrity, and availability. Although no active exploits have been reported in the wild, the public disclosure of the exploit code increases the likelihood of attacks. The vulnerability underscores the importance of secure coding practices, particularly input validation and parameterized queries, in web applications handling sensitive educational data.

The exploitation of this SQL injection vulnerability can have significant consequences for organizations using the PHPGurukul Online Course Registration System. Attackers could gain unauthorized access to sensitive student and course data, leading to confidentiality breaches. They may also alter or delete records, compromising data integrity and potentially disrupting course registration processes, impacting availability. Such data manipulation could result in administrative confusion, loss of trust, and regulatory compliance issues related to data protection laws. Educational institutions relying on this system could face operational disruptions and reputational damage. Additionally, attackers might leverage the vulnerability as a foothold to escalate attacks within the network, potentially accessing other critical systems. The public availability of exploit code increases the risk of automated or opportunistic attacks, emphasizing the need for immediate remediation.

To mitigate CVE-2026-0803, organizations should first verify if they are running affected versions (3.0 or 3.1) of the PHPGurukul Online Course Registration System. Since no official patches are currently listed, immediate steps include implementing input validation and sanitization on all parameters in /enroll.php, especially studentregno, Pincode, session, department, level, course, and sem. Employ parameterized queries or prepared statements to prevent SQL injection. Restrict database user permissions to the minimum necessary to limit potential damage. Monitor web application logs for suspicious input patterns indicative of SQL injection attempts. Consider deploying a Web Application Firewall (WAF) with rules targeting SQL injection signatures. If possible, isolate the affected system within the network to reduce exposure. Regularly back up databases to enable recovery in case of data tampering. Stay alert for official patches or updates from the vendor and apply them promptly once available.