CVE-2026-13497: Hospital Management System SQLi Flaw

CVE-2026-13497 Overview

CVE-2026-13497 is a SQL injection vulnerability in itsourcecode Hospital Management System 1.0. The flaw resides in an unspecified function within the /appointment.php file. Attackers can manipulate the editid parameter to inject arbitrary SQL statements into the backend database query. The vulnerability is exploitable remotely and requires only low-privileged authenticated access. The exploit details have been publicly disclosed, increasing the likelihood of opportunistic attacks against exposed installations. This weakness is categorized under [CWE-74] (Improper Neutralization of Special Elements in Output Used by a Downstream Component).

Critical Impact
Remote attackers with low-level access can inject SQL commands through the editid parameter in /appointment.php, potentially exposing patient records, appointment data, and other sensitive hospital information.

Affected Products

itsourcecode Hospital Management System 1.0
Deployments referencing the vulnerable /appointment.php endpoint
Any downstream forks that reuse the affected appointment handling code

Discovery Timeline

2026-06-28 - CVE-2026-13497 published to the National Vulnerability Database
2026-06-29 - Last updated in NVD database

Technical Details for CVE-2026-13497

Vulnerability Analysis

The vulnerability exists in the appointment handling logic of the Hospital Management System. The /appointment.php script accepts an editid parameter from HTTP requests and passes it into a SQL query without adequate sanitization or parameterization. Because the parameter value is concatenated directly into the query string, an attacker can break out of the intended query context and append arbitrary SQL clauses.

Successful exploitation allows the attacker to read, modify, or delete data from the underlying database. Depending on the database user permissions, the attacker may enumerate patient records, extract credentials, or escalate their impact through techniques such as time-based blind extraction or UNION-based data exfiltration.

Root Cause

The root cause is improper neutralization of user-supplied input within a downstream SQL statement [CWE-74]. The editid argument is treated as trusted data and concatenated into the query rather than bound as a parameter. No allow-list validation or type coercion is applied before the value reaches the database driver.

Attack Vector

Exploitation is performed over the network by sending a crafted HTTP request to /appointment.php with a malicious editid value. The attacker needs low-level privileges to reach the endpoint. No user interaction is required, and the exploit code is publicly available, lowering the barrier to weaponization.

A proof-of-concept payload targets the editid parameter by appending SQL syntax such as ' OR 1=1-- or UNION-based selectors to enumerate table contents. Refer to the GitHub Issue Discussion and VulDB CVE-2026-13497 entry for full technical details.

Detection Methods for CVE-2026-13497

Indicators of Compromise

HTTP requests to /appointment.php containing SQL metacharacters such as single quotes, UNION SELECT, --, or OR 1=1 in the editid parameter
Unusual database errors or verbose SQL error messages appearing in web server logs following requests to the appointment endpoint
Anomalous outbound queries or large response sizes from the appointment handler indicating data exfiltration

Detection Strategies

Deploy web application firewall (WAF) rules that inspect editid and other query parameters for SQL injection signatures
Enable query logging on the database backend and alert on syntactically malformed statements originating from the application user
Correlate authentication events with subsequent access to /appointment.php to identify low-privileged accounts probing the parameter

Monitoring Recommendations

Ingest web server access logs into a centralized analytics platform and baseline normal editid values, typically numeric identifiers
Alert on repeated failed SQL executions or spikes in appointment endpoint traffic from a single source IP
Monitor for unexpected schema queries such as information_schema references from the application service account

How to Mitigate CVE-2026-13497

Immediate Actions Required

Restrict access to /appointment.php through network controls or authentication proxies until a fix is deployed
Deploy WAF signatures blocking SQL injection payloads targeting the editid parameter
Audit database logs for prior exploitation attempts and rotate credentials that may have been exposed

Patch Information

No official vendor patch has been published at the time of NVD listing. Administrators should monitor the IT Source Code Resource and the VulDB Vulnerability #374492 entry for update announcements. In the interim, modify /appointment.php to use prepared statements with parameter binding for the editid value and enforce strict integer validation on the input.

Workarounds

Replace dynamic SQL concatenation in /appointment.php with parameterized queries using PDO or mysqli_prepare
Cast the editid parameter to an integer server-side before use and reject non-numeric input
Apply least-privilege database roles so the application account cannot access sensitive tables outside its scope

bash

# Example hardening: enforce integer casting and prepared statement in appointment.php
# Replace vulnerable pattern:
#   $editid = $_GET['editid'];
#   $sql = "SELECT * FROM appointments WHERE id = $editid";
# With parameterized version:
$editid = filter_input(INPUT_GET, 'editid', FILTER_VALIDATE_INT);
if ($editid === false || $editid === null) { http_response_code(400); exit; }
$stmt = $mysqli->prepare('SELECT * FROM appointments WHERE id = ?');
$stmt->bind_param('i', $editid);
$stmt->execute();