CVE-2026-78246: Online Clinic Management System SQL Injection

CVE-2026-78246 Overview

CVE-2026-78246 is a SQL injection vulnerability in itsourcecode Online Clinic Management System 1.0. The flaw resides in the success/login.php file within the Admin Login component. An attacker can manipulate the Username parameter to inject arbitrary SQL statements into the underlying database query. Remote exploitation is possible without authentication or user interaction. The exploit details have been publicly disclosed, increasing the likelihood of opportunistic attacks against exposed installations. The vulnerability is categorized under CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component).

Critical Impact

Unauthenticated attackers can inject SQL through the admin login form to read, modify, or bypass authentication against the clinic management database.

Affected Products

• itsourcecode Online Clinic Management System 1.0
• success/login.php (Admin Login component)
• Deployments exposing the admin login endpoint to untrusted networks

Discovery Timeline

• 2026-08-24 - CVE-2026-78246 published to NVD
• 2026-08-24 - Last updated in NVD database

Technical Details for CVE-2026-78246

Vulnerability Analysis

The vulnerability exists in the authentication handler at success/login.php. The application concatenates the Username request parameter directly into a SQL query without parameterization or input sanitization. An attacker submitting crafted SQL fragments in place of a normal username can alter the query's logic. Because the endpoint is reachable pre-authentication, no credentials are required to trigger the flaw. The disclosed proof of concept lowers the barrier to exploitation for opportunistic attackers scanning for vulnerable clinic management deployments.

Root Cause

The root cause is improper neutralization of special SQL characters in user-controlled input, consistent with CWE-74. The Username field flows into a dynamically built SQL string used for authentication. Absent prepared statements or input validation, characters such as single quotes, comments, and boolean operators reach the database engine and change the intent of the query.

Attack Vector

Exploitation occurs over the network against the admin login page. An attacker sends an HTTP POST request to success/login.php with a malicious Username value, typically containing SQL syntax such as tautologies or UNION SELECT clauses. Successful injection can bypass authentication, extract database contents including patient and staff records, or modify records depending on database privileges. Refer to the VulDB Vulnerability Details and the GitHub Issue Discussion for the disclosed technical write-up.

Detection Methods for CVE-2026-78246

Indicators of Compromise

• POST requests to success/login.php containing SQL metacharacters such as ', --, #, OR 1=1, or UNION SELECT in the Username field
• Web server logs showing repeated failed logins from a single source followed by an unexpected successful admin session
• Database error messages returned in HTTP responses referencing MySQL syntax near the login query
• Anomalous outbound data transfers from the web application host following login page activity

Detection Strategies

• Deploy web application firewall rules that inspect the Username parameter for SQL syntax on the login.php endpoint
• Enable database query logging and alert on authentication queries containing multiple quotes, comments, or unions
• Correlate web access logs with authentication events to detect logins that bypass expected credential validation flows

Monitoring Recommendations

• Monitor HTTP request bodies to /success/login.php for injection patterns and abnormal payload length
• Alert on unauthenticated access to admin functions following requests to the login endpoint
• Track database user activity for unusual SELECT statements against users, admin, or patients tables originating from the web application account

How to Mitigate CVE-2026-78246

Immediate Actions Required

• Restrict network access to the Online Clinic Management System admin login page using IP allow-lists or a VPN
• Place the application behind a web application firewall configured with SQL injection signatures for the Username parameter
• Review database and web server logs for prior exploitation attempts targeting success/login.php
• Rotate admin credentials and database service account passwords if compromise is suspected

Patch Information

No official vendor patch has been published for itsourcecode Online Clinic Management System 1.0 at the time of disclosure. Consult the IT Source Code Resource and the VulDB CVE Report for updated remediation status. Operators should apply source-level fixes by replacing string concatenation in success/login.php with parameterized queries using PDO or mysqli prepared statements.

Workarounds

• Implement server-side input validation that rejects non-alphanumeric characters in the Username field before it reaches the database layer
• Enforce least-privilege database accounts so that the web application user cannot read sensitive tables or execute administrative statements
• Disable or remove the vulnerable application from internet-facing infrastructure until a code-level fix is applied

# Example: block SQL metacharacters in Username at the reverse proxy (nginx)
location = /success/login.php {
    if ($request_method = POST) {
        if ($request_body ~* "Username=[^&]*([\'\";]|--|/\*|\bunion\b|\bselect\b)") {
            return 403;
        }
    }
    proxy_pass http://clinic_backend;
}