CVE-2026-13572: Hospital Management System SQLi Flaw

CVE-2026-13572 Overview

CVE-2026-13572 is a SQL injection vulnerability in itsourcecode Hospital Management System 1.0. The flaw resides in the /insertbillingrecord.php script, where the patientid parameter is passed to a database query without proper sanitization. An authenticated remote attacker can manipulate this parameter to inject arbitrary SQL statements against the backend database. The exploit details have been publicly disclosed, increasing the likelihood of opportunistic attacks against exposed instances. The weakness is classified under CWE-74 (Improper Neutralization of Special Elements in Output).

Critical Impact
Remote attackers with low privileges can inject SQL through the patientid parameter to read, modify, or delete billing and patient records.

Affected Products

itsourcecode Hospital Management System 1.0
/insertbillingrecord.php endpoint
Deployments exposing the billing module to untrusted networks

Discovery Timeline

2026-06-29 - CVE-2026-13572 published to NVD
2026-06-30 - Last updated in NVD database

Technical Details for CVE-2026-13572

Vulnerability Analysis

The vulnerability exists in the billing record insertion workflow of itsourcecode Hospital Management System 1.0. The /insertbillingrecord.php script accepts a patientid argument supplied by the client and concatenates it directly into a SQL statement. Because the input is not parameterized or escaped, an attacker can break out of the intended query context. The vendor identifies this class of issue as improper neutralization of special elements passed to a downstream component [CWE-74].

Exploitation requires network access to the application and a low-privileged authenticated session. No user interaction is needed once the attacker reaches the vulnerable endpoint. The public disclosure of the exploit path lowers the barrier for opportunistic scanning and abuse.

Root Cause

The root cause is the absence of prepared statements or input validation on the patientid parameter. Server-side PHP code interpolates the value into a SQL query string sent to the MySQL backend. Any special SQL syntax within the parameter is interpreted by the database engine rather than treated as literal data.

Attack Vector

An attacker submits a crafted HTTP request to /insertbillingrecord.php containing SQL metacharacters in the patientid field. The injected payload can enumerate database schema, extract patient and billing records, or modify data used for billing operations. Because the application handles healthcare data, successful exploitation raises regulatory exposure in addition to direct data integrity concerns.

The vulnerability manifests when unsanitized patientid values reach the SQL query builder. See the GitHub Issue Discussion and VulDB CVE-2026-13572 entries for the disclosed proof-of-concept details.

Detection Methods for CVE-2026-13572

Indicators of Compromise

HTTP POST or GET requests to /insertbillingrecord.php containing SQL metacharacters such as ', ", --, UNION, or SLEEP( in the patientid parameter
Unexpected MySQL error messages in web server or application logs referencing the billing insert query
Anomalous database queries returning large result sets from patient or billing tables

Detection Strategies

Deploy a web application firewall rule that inspects the patientid parameter on requests to /insertbillingrecord.php for SQL syntax
Enable MySQL general query logging temporarily to capture queries originating from the billing module and review for tautology-based injection patterns
Correlate authenticated session identifiers with abnormal request volumes to the billing endpoint

Monitoring Recommendations

Alert on repeated 500-series responses from /insertbillingrecord.php, which often indicate injection probing
Baseline normal request patterns for billing endpoints and flag deviations in parameter length or character composition
Retain web server access logs for at least 90 days to support retrospective investigation after public disclosure

How to Mitigate CVE-2026-13572

Immediate Actions Required

Restrict network access to the Hospital Management System so only trusted clinical networks can reach /insertbillingrecord.php
Revoke or rotate credentials for accounts that may have been used to probe the billing endpoint after the public disclosure date
Audit MySQL logs and patient billing tables for unauthorized modifications since 2026-06-29

Patch Information

No vendor patch is referenced in the published advisory data at this time. Consult the IT Source Code project page and the VulDB entry for CVE-2026-13572 for updates on remediation availability. Until a fix is released, apply application-layer controls and consider taking the affected module offline if it is not required.

Workarounds

Modify /insertbillingrecord.php to use parameterized queries via PHP Data Objects (PDO) or mysqli prepared statements for the patientid value
Enforce server-side input validation restricting patientid to numeric characters only
Deploy a WAF signature blocking common SQL injection payloads targeting the patientid argument
Apply least-privilege database credentials so the application account cannot alter schema or access tables outside its scope

bash

# Example ModSecurity rule to block SQL metacharacters in patientid
SecRule ARGS:patientid "@rx (?i)(union|select|sleep|--|';|\"|/\*)" \
    "id:1013572,phase:2,deny,status:403,\
    msg:'CVE-2026-13572 SQLi attempt on patientid',\
    logdata:'Matched Data: %{MATCHED_VAR}'"