CVE-2026-0547 is a vulnerability identified in PHPGurukul's Online Course Registration software, specifically affecting versions 3.0 and 3.1. The issue resides in the /admin/edit-student-profile.php file, where the 'photo' parameter is improperly handled, allowing unrestricted file uploads. This means an attacker with low privileges can remotely upload arbitrary files, including potentially malicious scripts, without sufficient validation or restrictions. The vulnerability does not require user interaction or elevated privileges beyond low-level access, making it easier to exploit in environments where attackers have limited access. The unrestricted upload can lead to remote code execution if the uploaded file is a web shell or other executable script, compromising the server's confidentiality, integrity, and availability. While no known exploits are currently reported in the wild, the public disclosure of the vulnerability increases the risk of exploitation. The CVSS 4.0 vector indicates network attack vector, low attack complexity, no privileges required beyond low privileges, and no user interaction needed, with limited impact on confidentiality, integrity, and availability. The lack of patch links suggests that fixes may not yet be widely available, emphasizing the need for immediate mitigation steps.

The unrestricted file upload vulnerability in PHPGurukul Online Course Registration can have significant impacts on organizations using affected versions. Attackers could upload malicious files leading to remote code execution, enabling full system compromise. This could result in data breaches involving sensitive student information, unauthorized access to administrative functions, and potential disruption of educational services. The integrity of student records and course data could be altered or destroyed. Availability could be impacted if attackers deploy ransomware or cause denial-of-service conditions. The medium CVSS score reflects moderate but tangible risks, especially in environments where the application is internet-facing or integrated with other critical systems. The vulnerability's ease of exploitation without user interaction or high privileges increases the threat landscape, making it attractive for attackers targeting educational institutions or related organizations.

Organizations should immediately assess their use of PHPGurukul Online Course Registration versions 3.0 and 3.1 and plan to upgrade to patched versions once available. In the absence of official patches, implement strict input validation and file type restrictions on the 'photo' upload functionality to prevent unauthorized file types. Employ server-side checks to verify file extensions, MIME types, and scan uploaded files for malware. Restrict upload directories to non-executable locations and configure web servers to disallow execution of uploaded files. Implement strong access controls to limit administrative interface access to trusted users and networks. Monitor logs for unusual upload activity and conduct regular security audits. Consider deploying web application firewalls (WAF) with rules to detect and block suspicious file uploads. Educate administrators about the risks and signs of exploitation attempts. Finally, isolate the affected application environment to minimize lateral movement in case of compromise.