CVE-2026-105181: Online Admission System 1.0 SQLi Vulnerability

CVE-2026-105181 Overview

CVE-2026-105181 is a SQL injection vulnerability in itsourcecode Online Admission System 1.0. The flaw resides in the register1.php script, where the fname parameter is passed into a database query without proper sanitization. Attackers can manipulate the parameter to inject arbitrary SQL statements. The issue is remotely exploitable and requires only low-level privileges. Public exploit details have been disclosed, increasing the likelihood of opportunistic abuse 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 with low privileges can inject SQL statements through the fname parameter in register1.php, potentially exposing or altering records in the admission system database.

Affected Products

itsourcecode Online Admission System 1.0
Vulnerable component: register1.php
Affected parameter: fname

Discovery Timeline

2026-10-05 - CVE-2026-105181 published to NVD
2026-10-06 - Last updated in NVD database

Technical Details for CVE-2026-105181

Vulnerability Analysis

The vulnerability exists in the registration workflow of the Online Admission System. The register1.php endpoint accepts user-supplied input via the fname parameter and incorporates that value directly into a backend SQL statement. Because the input is neither parameterized nor properly escaped, attackers can break out of the intended string context and append arbitrary SQL clauses.

Successful exploitation can reveal, modify, or delete rows in the application database. Depending on the privileges of the database account used by the application, impact may extend to adjacent schemas and tables. The disclosed exploit lowers the technical bar for attackers to replicate the attack.

Root Cause

The root cause is improper neutralization of special elements in SQL ([CWE-74]). The application constructs a dynamic query that concatenates the fname request parameter into the statement body. No prepared statements, bind variables, or input validation routines are applied before execution.

Attack Vector

An authenticated remote attacker submits a crafted HTTP request to register1.php, placing SQL syntax inside the fname parameter. The injected payload executes within the application's database session. The attack requires no user interaction and can be automated against internet-facing instances. Refer to the VulDB entry for CVE-2026-105181 and the GitHub proof-of-concept writeup for additional technical context.

Detection Methods for CVE-2026-105181

Indicators of Compromise

HTTP POST or GET requests to register1.php containing SQL meta-characters such as single quotes, UNION, SELECT, OR 1=1, or SQL comment sequences in the fname parameter.
Database error messages or anomalous response sizes returned from the admission registration endpoint.
Unexpected rows, administrative accounts, or modified records appearing in the admission database.

Detection Strategies

Deploy web application firewall signatures that inspect form parameters submitted to register1.php for SQL injection patterns.
Enable database query logging and alert on queries originating from the application user that reference unexpected tables or use tautologies.
Correlate web server access logs with database audit logs to identify suspicious request-to-query chains against the registration workflow.

Monitoring Recommendations

Monitor outbound traffic from the web server to detect data exfiltration following successful injection.
Track authentication events for newly created or escalated accounts in the admission application.
Review file integrity on register1.php and adjacent PHP files to detect webshell deployment that may follow database compromise.

How to Mitigate CVE-2026-105181

Immediate Actions Required

Restrict network access to the Online Admission System until a fix is applied, limiting exposure to trusted administrative networks.
Audit the admission database for unauthorized records, modified rows, and added privileged accounts.
Rotate database credentials used by the application and reduce the database user to the minimum privileges required.

Patch Information

No vendor patch has been published in the referenced advisories at the time of writing. Administrators should monitor the itsourcecode website and the VulDB vulnerability record for updates. Where source code access exists, replace concatenated SQL in register1.php with parameterized queries using PDO or MySQLi prepared statements.

Workarounds

Place a web application firewall in front of the application with rules that block SQL injection patterns targeting the fname parameter.
Apply server-side input validation that rejects non-alphabetic characters in first-name fields before the request reaches the database layer.
Disable or remove the registration endpoint if it is not actively required for operations.

bash

# Example ModSecurity rule to block SQLi patterns in fname on register1.php
SecRule REQUEST_URI "@endsWith /register1.php" \
  "id:1050181,phase:2,deny,status:403,log,\
   msg:'Possible SQLi in fname (CVE-2026-105181)',\
   chain"
  SecRule ARGS:fname "@rx (?i)(\bunion\b|\bselect\b|--|';|\bor\b\s+\d+=\d+)" \
    "t:none,t:urlDecodeUni"