SQL Injection in Doctor Appointment System 1.0

Doctor Appointment System version 1.0 contains an SQL injection vulnerability located in the patient_login.php file. The vulnerability is triggered via the manipulation of the email argument provided during the authentication process. Because the application fails to properly sanitize user-supplied input before incorporating it into database queries, remote, unauthenticated attackers can inject arbitrary SQL commands. This flaw poses a significant risk to the confidentiality and integrity of the underlying database, potentially allowing attackers to bypass authentication mechanisms, extract sensitive patient information, or modify database content. Given that proof-of-concept exploit code is publicly available, the likelihood of exploitation by threat actors is increased. Defenders should assess their deployments for the presence of this legacy software and consider migration to more secure alternatives.

Impact

Successful exploitation of CVE-2026-85225 allows an unauthenticated remote attacker to gain unauthorized access to the system backend. This can result in the full compromise of the application database, exposure of sensitive PII (Personally Identifiable Information) regarding patients and clinical staff, and potential administrative account takeover, depending on database privileges.

Recommendation

• Identify and decommission all instances of Doctor Appointment System 1.0 due to the lack of security patches and known public exploitation.
• Implement web application firewall (WAF) rules to detect and block SQL injection payloads targeting the /patient_login.php endpoint, specifically looking for common SQL syntax characters in the email parameter.
• Use the Sigma rule provided below to monitor web server logs for exploitation attempts targeting this specific file.