CVE-2026-0547 is a vulnerability identified in PHPGurukul Online Course Registration software versions 3.0 and 3.1, specifically within the /admin/edit-student-profile.php file handling the 'photo' parameter. The flaw allows an attacker with limited privileges (PR:L) to perform an unrestricted file upload remotely (AV:N), without requiring user interaction (UI:N). The vulnerability arises from insufficient validation or sanitization of the uploaded file, enabling an attacker to upload malicious files such as web shells or scripts. This can lead to unauthorized code execution, data leakage, or defacement of the web application. The CVSS 4.0 vector indicates low complexity (AC:L), no authentication bypass (AT:N), and limited impact on confidentiality, integrity, and availability (VC:L, VI:L, VA:L). Although no known exploits are currently active in the wild, the public availability of exploit code increases the likelihood of attacks. The vulnerability affects the Student Registration Page component, which is likely accessible to users with some administrative or student profile editing privileges, making it a significant risk if access controls are weak. The lack of patch links suggests that vendors or maintainers have not yet released an official fix, emphasizing the need for immediate mitigation strategies.

For European organizations, particularly educational institutions using PHPGurukul Online Course Registration software, this vulnerability poses a risk of unauthorized file uploads leading to server compromise. Attackers could deploy web shells or malware, resulting in data breaches, defacement, or disruption of services. The impact extends to confidentiality (exposure of student data), integrity (modification of records or system files), and availability (service outages due to malicious payloads). Given the remote exploitability and no requirement for user interaction, attackers can automate exploitation attempts, increasing risk. The medium severity suggests moderate but tangible risk, especially where the software is deployed in critical academic environments. Additionally, compliance with GDPR and other data protection regulations could be jeopardized if personal data is exposed or manipulated. The absence of patches means organizations must rely on compensating controls, increasing operational overhead and risk exposure until remediation is available.

Organizations should immediately implement strict server-side validation of all uploaded files in the /admin/edit-student-profile.php component, ensuring only allowed file types (e.g., JPEG, PNG) are accepted and verifying file headers and MIME types. Employ file size limits and rename uploaded files to prevent execution of malicious scripts. Restrict upload functionality to trusted, authenticated users with minimal necessary privileges and enforce strong access controls on the administration interface. Use web application firewalls (WAFs) to detect and block suspicious upload attempts. Monitor logs for unusual activity related to file uploads and conduct regular security audits of the affected application components. If possible, isolate the upload directory from executable permissions to prevent execution of uploaded files. Engage with the vendor or community to obtain patches or updates and apply them promptly once available. Additionally, consider deploying runtime application self-protection (RASP) solutions to detect exploitation attempts in real time.