CVE-2026-0733 identifies a SQL injection vulnerability in the PHPGurukul Online Course Registration System, specifically in versions 3.0 and 3.1. The vulnerability resides in the /onlinecourse/admin/manage-students.php script, where the id or cid parameters are insufficiently sanitized, allowing attackers to inject arbitrary SQL commands. This injection flaw can be exploited remotely without requiring user interaction or authentication, though it requires low privileges, likely meaning some level of access to the admin interface or a related function. The vulnerability enables attackers to manipulate backend database queries, potentially leading to unauthorized disclosure, modification, or deletion of sensitive student or course data. The CVSS 4.0 vector indicates network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:L), no user interaction (UI:N), and low impact on confidentiality, integrity, and availability (VC:L, VI:L, VA:L). Although no known exploits are currently active in the wild, the public disclosure increases the risk of exploitation by threat actors. The lack of available patches at the time of disclosure necessitates immediate mitigation efforts by administrators. This vulnerability is particularly critical for educational institutions relying on PHPGurukul for course registration and student management, as exploitation could compromise sensitive academic records and personal information.

The primary impact of CVE-2026-0733 is unauthorized access and manipulation of the backend database of the PHPGurukul Online Course Registration System. Successful exploitation could allow attackers to retrieve sensitive student data, alter course registrations, or delete records, undermining data integrity and availability. This could lead to privacy violations, regulatory non-compliance (e.g., GDPR, FERPA), reputational damage, and operational disruptions for educational institutions. Since the vulnerability can be exploited remotely without user interaction, attackers can automate attacks at scale, increasing the risk of widespread data breaches. The medium severity rating reflects limited impact scope due to required privileges and low impact on confidentiality, integrity, and availability individually, but combined effects could be significant for affected organizations. The lack of known exploits in the wild currently reduces immediate risk but does not eliminate it, especially given public disclosure. Organizations worldwide using PHPGurukul versions 3.0 or 3.1 are at risk, particularly those with large user bases or sensitive data.

1. Immediately restrict access to the /onlinecourse/admin/manage-students.php page to trusted administrators only, using network-level controls such as VPNs or IP whitelisting. 2. Implement strict input validation and sanitization on all parameters, especially id and cid, to prevent injection of malicious SQL code. 3. Refactor database queries to use parameterized statements or prepared queries to eliminate SQL injection vectors. 4. Monitor web server and application logs for suspicious activity targeting the vulnerable parameters. 5. If possible, upgrade to a patched version of PHPGurukul once available or apply vendor-provided patches promptly. 6. Employ Web Application Firewalls (WAFs) with rules designed to detect and block SQL injection attempts targeting the affected endpoints. 7. Conduct security audits and penetration testing focused on injection vulnerabilities in the application. 8. Educate administrators on the risks of SQL injection and enforce the principle of least privilege for user roles accessing the admin interface. 9. Backup databases regularly and ensure backups are stored securely to enable recovery in case of data tampering or loss.