CVE-2025-9307 is a SQL Injection vulnerability identified in version 3.1 of the PHPGurukul Online Course Registration system, specifically within an unknown function in the /admin/session.php file. The vulnerability arises from improper sanitization or validation of the 'sesssion' argument, which can be manipulated remotely by an unauthenticated attacker. This flaw allows the attacker to inject malicious SQL code into the backend database queries executed by the application. Given that the attack vector requires no authentication or user interaction and can be performed remotely, the vulnerability presents a significant risk. The CVSS 4.0 base score is 6.9 (medium severity), reflecting that the attack vector is network-based with low attack complexity and no privileges or user interaction required. The impact on confidentiality, integrity, and availability is rated low individually but combined can lead to unauthorized data access, modification, or potential disruption of service. Although no known exploits are reported in the wild yet, the exploit code has been published, increasing the likelihood of exploitation. The lack of available patches or vendor advisories at this time further exacerbates the risk. The vulnerability affects only version 3.1 of the PHPGurukul Online Course Registration product, which is a niche web application used primarily in educational institutions for course enrollment management.

For European organizations, especially educational institutions and training providers using PHPGurukul Online Course Registration 3.1, this vulnerability could lead to unauthorized access to sensitive student and administrative data, including personal information and course enrollment details. Attackers could leverage the SQL Injection to extract confidential data, modify records, or disrupt registration services, potentially impacting operational continuity and data privacy compliance under GDPR. The exposure of personal data could result in regulatory penalties and reputational damage. Moreover, if attackers escalate the attack, they might pivot to other internal systems via compromised credentials or data. The medium severity score suggests a moderate but tangible risk, particularly for institutions lacking robust network segmentation or intrusion detection capabilities. Since the vulnerability requires no authentication, any exposed installation accessible over the internet is at risk, increasing the attack surface for European educational entities that have adopted this software without adequate security controls.

Immediate mitigation should focus on restricting external access to the /admin/session.php endpoint by implementing network-level controls such as IP whitelisting or VPN access for administrative interfaces. Web application firewalls (WAFs) should be configured to detect and block SQL Injection patterns targeting the 'sesssion' parameter. Organizations should conduct thorough input validation and sanitization on all user-supplied data, especially parameters used in SQL queries. Since no official patch is currently available, consider deploying virtual patching through WAF rules or custom filters. Additionally, monitoring database logs and application logs for unusual query patterns or errors can help detect exploitation attempts early. Organizations should also inventory their software to identify affected versions and plan for upgrading or replacing the vulnerable PHPGurukul Online Course Registration system once a vendor patch is released. Regular backups and incident response plans should be updated to prepare for potential data breaches or service disruptions stemming from exploitation.