CVE-2026-1545: School Management System SQLi Vulnerability

CVE-2026-1545 Overview

CVE-2026-1545 is a SQL injection vulnerability in itsourcecode School Management System version 1.0. The flaw resides in the /course/index.php file, where the ID parameter is passed to a database query without proper sanitization. Remote attackers can manipulate the ID argument to inject arbitrary SQL statements. The exploit has been publicly disclosed, increasing the likelihood of opportunistic attacks against exposed deployments. The vulnerability is classified under [CWE-74] (Improper Neutralization of Special Elements in Output Used by a Downstream Component).

Critical Impact
Remote attackers can execute arbitrary SQL queries against the backend database without authentication, leading to unauthorized data access, modification, or deletion.

Affected Products

Angeljudesuarez School Management System 1.0
Component: /course/index.php
CPE: cpe:2.3:a:angeljudesuarez:school_management_system:1.0

Discovery Timeline

2026-01-28 - CVE-2026-1545 published to NVD
2026-04-29 - Last updated in NVD database

Technical Details for CVE-2026-1545

Vulnerability Analysis

The vulnerability stems from improper input validation in the course listing functionality of the School Management System. The /course/index.php script accepts an ID parameter via HTTP request and concatenates it directly into a SQL query. This allows attackers to break out of the intended query context and append malicious SQL syntax.

The attack requires no authentication and no user interaction. An attacker only needs network access to the application to send crafted HTTP requests. Successful exploitation grants the attacker the same database privileges as the application's database user.

The public availability of exploitation details lowers the technical barrier for attackers. Automated scanners and opportunistic threat actors can identify and exploit vulnerable instances at scale.

Root Cause

The root cause is the use of unsanitized user input in SQL query construction. The application fails to use parameterized queries or prepared statements when handling the ID parameter. Input from the HTTP request reaches the SQL engine without escaping or type validation.

Attack Vector

An attacker submits a crafted HTTP request to /course/index.php with a malicious ID parameter value. The injected payload manipulates the underlying SQL query to extract database contents, bypass authentication, or modify records. Common exploitation techniques include UNION-based injection to exfiltrate data and boolean-based blind injection when responses do not return query output directly.

The vulnerability mechanism is documented in the public GitHub issue and the VulDB entry #343229.

Detection Methods for CVE-2026-1545

Indicators of Compromise

HTTP requests to /course/index.php containing SQL metacharacters such as single quotes, UNION, SELECT, --, or /* in the ID parameter
Unexpected database error messages in web server logs originating from the course endpoint
Anomalous outbound data volumes from the database server following requests to the course module
Web application firewall (WAF) alerts flagging SQL injection signatures against the affected URL

Detection Strategies

Inspect web server access logs for non-numeric values in the ID query parameter of /course/index.php
Deploy SQL injection signature rules in your WAF or intrusion detection system targeting the affected endpoint
Correlate web request anomalies with database query logs to identify suspicious query patterns
Monitor application error logs for syntax errors that may indicate probing activity

Monitoring Recommendations

Enable verbose logging on the web server and database to capture full request URIs and query strings
Track repeated requests from a single source IP targeting /course/index.php with varying ID values
Alert on database authentication failures or schema enumeration queries originating from the application account

How to Mitigate CVE-2026-1545

Immediate Actions Required

Restrict public access to the School Management System until a patched version is available
Deploy a WAF rule blocking SQL injection patterns against /course/index.php
Audit database logs for prior suspicious queries from the application account
Rotate database credentials and review user privileges if compromise is suspected

Patch Information

No official vendor patch has been published at the time of disclosure. Refer to the VulDB advisory and the GitHub issue tracker for updates. Organizations using this software should consider migrating to an actively maintained alternative.

Workarounds

Apply input validation in front of the application using a reverse proxy to enforce numeric-only values for the ID parameter
Restrict the database account used by the application to read-only permissions where possible
Isolate the application from the public internet using network segmentation and VPN-based access
Implement parameterized queries in the source code if you maintain a local fork of the application

bash

# Example ModSecurity rule to block non-numeric ID parameter values
SecRule ARGS:ID "!@rx ^[0-9]+$" \
    "id:1000545,phase:2,deny,status:403,\
    msg:'CVE-2026-1545 - SQL Injection attempt on /course/index.php',\
    tag:'sql-injection'"