CVE-2026-105254: Online Admission System 1.0 SQLi Vulnerability

CVE-2026-105254 Overview

CVE-2026-105254 is a SQL injection vulnerability in itsourcecode Online Admission System 1.0. The flaw resides in an unspecified function within the /admin/schoolyear.php script. Attackers manipulate the sy parameter to inject arbitrary SQL statements into backend database queries. The vulnerability is remotely exploitable and requires low-privilege authentication. Public exploit details are available, increasing the likelihood of opportunistic abuse against unpatched installations. The weakness is categorized under CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component.

Critical Impact
Authenticated remote attackers can inject SQL statements through the sy parameter in /admin/schoolyear.php, potentially exposing or modifying admissions data stored in the backend database.

Affected Products

itsourcecode Online Admission System 1.0
Component: /admin/schoolyear.php
Vulnerable parameter: sy

Discovery Timeline

2026-10-05 - CVE-2026-105254 published to NVD
2026-10-07 - Last updated in NVD database

Technical Details for CVE-2026-105254

Vulnerability Analysis

The vulnerability affects the administrative school-year management page in the Online Admission System. The sy request parameter is passed into a SQL query without proper sanitization or parameterization. An authenticated attacker with low privileges can submit crafted input through this parameter to alter the structure of the executed query. Successful exploitation can disclose, modify, or delete records in the admissions database. Because the application is a web-based PHP project frequently deployed by educational institutions, exposed instances are reachable over the network. Details referenced in the GitHub Issue Discussion and VulDB CVE-2026-105254 entry describe the injection point.

Root Cause

The root cause is improper neutralization of user-controlled input before use in a SQL statement [CWE-74]. The schoolyear.php handler concatenates the sy parameter directly into a query string instead of using prepared statements or bound parameters. No input validation or escaping routine filters SQL metacharacters.

Attack Vector

An attacker authenticates to the admin interface with any valid low-privilege account and issues an HTTP request to /admin/schoolyear.php containing a malicious sy value. The injected payload executes within the database context used by the application. No user interaction beyond the attacker's request is required. Refer to the VulDB Vulnerability #413463 record for additional exploitation context.

Detection Methods for CVE-2026-105254

Indicators of Compromise

HTTP requests to /admin/schoolyear.php containing SQL metacharacters such as single quotes, UNION, SELECT, --, or ; in the sy parameter.
Web server access logs showing unusually long or encoded values for the sy query string.
Database error messages referencing syntax errors tied to the schoolyear query path.

Detection Strategies

Enable verbose logging on the web server and database tier to capture full query strings and error traces for /admin/schoolyear.php.
Deploy a web application firewall (WAF) with SQL injection signatures tuned to inspect the sy parameter.
Perform authenticated dynamic application security testing (DAST) against the admin interface to confirm the injection point is remediated.

Monitoring Recommendations

Alert on repeated 500-level responses from /admin/schoolyear.php, which often indicate injection attempts triggering SQL errors.
Monitor database audit logs for unexpected UNION, INFORMATION_SCHEMA, or administrative queries originating from the application service account.
Track admin account authentication patterns to detect credential abuse that precedes exploitation.

How to Mitigate CVE-2026-105254

Immediate Actions Required

Restrict network access to the /admin/ path using IP allowlists or VPN-only access until a fix is applied.
Rotate admin credentials and enforce strong password policies to limit low-privilege account abuse.
Review database and application logs for prior exploitation attempts against /admin/schoolyear.php.

Patch Information

No official vendor patch is currently referenced in the advisory data. Operators should monitor the IT Source Code Overview project page and the VulDB CVE-2026-105254 record for updates. Until a vendor fix is published, apply source-level mitigation by refactoring the affected query to use parameterized statements.

Workarounds

Modify schoolyear.php to use PHP Data Objects (PDO) with bound parameters instead of string concatenation for the sy value.
Add server-side input validation that restricts the sy parameter to an expected numeric or whitelisted format.
Deploy WAF rules to block requests to /admin/schoolyear.php containing SQL metacharacters in the sy parameter.

bash

# Example ModSecurity rule to block SQLi patterns in the sy parameter
SecRule ARGS:sy "@rx (?i)(union(.*?)select|select(.*?)from|insert(.*?)into|--|;|/\*)" \
    "id:1052540,phase:2,deny,status:403,msg:'Potential SQLi targeting CVE-2026-105254'"