CVE-2026-13541: Hospital Management System SQLi Vulnerability

CVE-2026-13541 Overview

CVE-2026-13541 is a SQL injection vulnerability in itsourcecode Hospital Management System 1.0. The flaw resides in the /doctorchangepassword.php script, where the newpassword parameter is passed to a database query without proper sanitization. Remote attackers with low-level authenticated access can manipulate the parameter to inject arbitrary SQL statements. The vulnerability is categorized under [CWE-74] (Improper Neutralization of Special Elements in Output Used by a Downstream Component). Public exploit details have been disclosed through VulDB and a related GitHub issue tracker, increasing the risk of opportunistic abuse against exposed installations.

Critical Impact
Authenticated remote attackers can inject SQL statements through the newpassword parameter in /doctorchangepassword.php, potentially compromising the underlying database used by the Hospital Management System.

Affected Products

itsourcecode Hospital Management System 1.0
Deployments exposing /doctorchangepassword.php to authenticated users
Installations that retain default itsourcecode PHP source without input sanitization patches

Discovery Timeline

2026-06-29 - CVE-2026-13541 published to NVD
2026-06-29 - Last updated in NVD database

Technical Details for CVE-2026-13541

Vulnerability Analysis

The vulnerability exists in the password change workflow implemented in /doctorchangepassword.php. The script accepts a newpassword HTTP parameter and concatenates it into a SQL UPDATE statement without parameterized queries or input escaping. An attacker who holds a low-privilege doctor account can submit crafted payloads to modify query logic. Because the application is written in PHP and typically backed by MySQL, injected clauses can be used to alter query results, extract data with UNION-based techniques, or manipulate other rows in the users table.

The issue falls under [CWE-74] injection. The attacker requires network access to the web application and a valid low-privileged session. No user interaction is required beyond issuing the malicious HTTP request. Because hospital management systems store sensitive personally identifiable information (PII) and protected health information (PHI), successful exploitation carries regulatory and privacy implications despite the low base score.

Root Cause

The root cause is the lack of prepared statements or input validation on the newpassword parameter before it is included in a SQL query. The developer used direct string concatenation instead of parameter binding provided by PDO or mysqli_prepare().

Attack Vector

An authenticated user issues a POST or GET request to /doctorchangepassword.php with a crafted newpassword value containing SQL metacharacters such as single quotes, comment sequences, and additional clauses. The injected SQL executes with the privileges of the application's database user, which typically has broad access to the hospital management schema.

No verified proof-of-concept code has been published in a curated repository. Technical write-ups are available in the GitHub Issue Tracker and the VulDB CVE-2026-13541 entry.

Detection Methods for CVE-2026-13541

Indicators of Compromise

Unexpected POST or GET requests to /doctorchangepassword.php containing SQL metacharacters such as ', --, UNION, or SLEEP( in the newpassword field.
Database error messages referencing MySQL syntax errors originating from the password change workflow.
Unusual changes to the doctor or users table, including password hashes updated for accounts other than the requester.

Detection Strategies

Deploy web application firewall (WAF) rules that inspect the newpassword parameter for SQL injection payload patterns.
Enable verbose query logging on the backing MySQL server and alert on syntactically malformed statements or long-running queries triggered by the password change endpoint.
Correlate authentication logs with database activity to flag low-privilege doctor accounts issuing requests that alter multiple rows.

Monitoring Recommendations

Monitor HTTP access logs for repeated 500-series responses on /doctorchangepassword.php, which often indicate injection probing.
Track outbound network connections from the web server to unusual destinations, which can indicate data exfiltration following successful injection.
Baseline normal password change frequency per user account and alert on outliers.

How to Mitigate CVE-2026-13541

Immediate Actions Required

Restrict network access to the Hospital Management System to trusted internal networks or VPN-connected users until a patched build is available.
Rotate credentials for all doctor accounts and review recent modifications to user and doctor records in the database.
Deploy WAF signatures that block SQL injection patterns targeting the newpassword parameter.

Patch Information

No official vendor patch has been referenced in the NVD entry. Administrators should monitor the IT Source Code Repository and the VulDB Vulnerability #374549 page for updates. Where source code access is available, replace the vulnerable query in /doctorchangepassword.php with a prepared statement using PDO or mysqli with bound parameters.

Workarounds

Modify /doctorchangepassword.php to use parameterized queries and enforce server-side validation on password length and character set.
Apply a least-privilege database account for the web application, limiting it to UPDATE on required columns only.
Consider disabling the doctor password self-service function and handling resets through an administrator until code fixes are validated.

bash

# Example nginx location block to restrict access to the vulnerable endpoint
location = /doctorchangepassword.php {
    allow 10.0.0.0/8;
    deny all;
}