Vulnerabilidad de Cross-Site Scripting (XSS) en addNotice del sistema Advanced School Management System de SourceCodester

Successful exploitation of CVE-2025-9306 allows an attacker to inject arbitrary JavaScript code into the Advanced School Management System. This code can then be executed in the context of a user's browser when they visit a crafted URL. The immediate impact is the potential for session hijacking, where an attacker can steal a user's session cookie and impersonate them. Furthermore, attackers could use this vulnerability to steal sensitive data displayed on the page, such as student records or administrative information. The attack is remotely exploitable, expanding the potential attack surface.

Schools and educational institutions using the Advanced School Management System version 1.0 are at significant risk. Organizations relying on this system for managing student data and administrative tasks should prioritize patching. Shared hosting environments where multiple users share the same server instance are particularly vulnerable, as an attacker could potentially compromise other users through this vulnerability.

• generic web: Use curl or wget to test the /index.php/notice/addNotice endpoint with a malicious payload (e.g., <script>alert('XSS')</script>).

curl -X POST -d "noticeSubject=<script>alert('XSS')</script>" http://your-school-management-system/index.php/notice/addNotice

• generic web: Examine access and error logs for suspicious requests containing XSS payloads. • php: Review the /index.php/notice/addNotice file for inadequate input validation or output encoding of the 'noticeSubject' parameter.

1. 2025-08-21Disclosure

   disclosure

2. 2025-08-21PoC

   poc

3. 2025-08-21Patch

   patch

1. Reservado2025-08-21
2. Publicada2025-08-21
3. Modificada2025-08-22
4. EPSS actualizado2026-03-23

The primary mitigation for CVE-2025-9306 is to upgrade to version 1.0.1 of the Advanced School Management System. If upgrading is not immediately feasible, consider implementing input validation and output encoding on the 'noticeSubject' parameter within the /index.php/notice/addNotice file. Web application firewalls (WAFs) configured to detect and block XSS payloads can also provide a temporary layer of protection. Regularly scan the application for XSS vulnerabilities using automated tools.