Attack Chain

1. Attacker identifies a vulnerable instance of itsourcecode Electronic Judging System 1.0.
2. The attacker crafts a malicious HTTP request targeting the /admin/edit_team.php endpoint.
3. The attacker injects SQL code into the num_id parameter within the HTTP request’s query string or POST data.
4. The application fails to properly sanitize the input, allowing the injected SQL code to be passed to the database server.
5. The database server executes the attacker-controlled SQL code.
6. The attacker retrieves sensitive information from the database, such as usernames, passwords, or judging data.
7. The attacker modifies data within the database, potentially altering judging results or compromising user accounts.
8. The attacker gains complete control over the application and underlying server.

Impact

Successful exploitation of this SQL injection vulnerability (CVE-2026-9526) can lead to severe consequences, including unauthorized access to sensitive judging data, manipulation of results, and complete compromise of the affected system. The number of victims is currently unknown but could impact any organization using the vulnerable version of itsourcecode Electronic Judging System. This could result in significant reputational damage, financial losses, and legal repercussions.

Recommendation

• Apply appropriate input validation and sanitization to the num_id parameter in /admin/edit_team.php to prevent SQL injection (CVE-2026-9526).
• Deploy the Sigma rule provided to detect potential exploitation attempts targeting the vulnerable endpoint.
• Implement a web application firewall (WAF) rule to block requests containing SQL injection payloads directed at /admin/edit_team.php.
• Restrict access to the /admin/edit_team.php endpoint to authorized personnel only.
• Monitor web server logs for suspicious activity targeting the /admin/edit_team.php endpoint.