CVE-2025-9306 in Advanced School Management System
Summary
by MITRE • 08/21/2025
A vulnerability was detected in SourceCodester Advanced School Management System 1.0. The impacted element is an unknown function of the file /index.php/notice/addNotice. The manipulation of the argument noticeSubject results in cross site scripting. It is possible to launch the attack remotely. The exploit is now public and may be used.
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Analysis
by VulDB Data Team • 08/23/2025
The vulnerability identified as CVE-2025-9306 resides within the SourceCodester Advanced School Management System version 1.0, specifically targeting the notice management functionality. This system appears to be a web-based platform designed for educational institutions to manage administrative notices and communications. The affected component is located at the /index.php/notice/addNotice endpoint, which suggests this is part of a larger web application framework that processes user inputs through PHP-based routing mechanisms. The vulnerability manifests when processing the noticeSubject parameter, indicating that this particular input field lacks proper sanitization or validation measures before being rendered back to users.
The core technical flaw represents a classic cross-site scripting vulnerability categorized under CWE-79, which occurs when user-controllable data is improperly escaped or filtered before being incorporated into web page content. The noticeSubject parameter serves as the attack vector where malicious input can be injected and subsequently executed within the browser context of other users who view the affected notice. This vulnerability specifically affects the input handling mechanism within the addNotice function, where the system fails to properly encode or validate user-supplied content before storing and displaying it. The issue is particularly concerning as it allows for the execution of arbitrary javascript code within the victim's browser session, potentially enabling session hijacking, credential theft, or redirection to malicious sites.
The operational impact of this vulnerability extends beyond simple data corruption or display issues, as it provides attackers with a persistent means of compromising user sessions within the school management system. Since the attack can be launched remotely without requiring local system access, threat actors can exploit this vulnerability from anywhere on the internet. The public availability of exploitation tools increases the likelihood of successful attacks, particularly against organizations that may not have implemented proper security monitoring or input validation measures. Users with elevated privileges within the system could be particularly vulnerable, as successful exploitation might allow attackers to access sensitive educational data, student records, or administrative functions. The vulnerability affects the system's integrity and confidentiality properties as defined by the CIA triad, potentially enabling unauthorized data access and manipulation.
Mitigation strategies for this vulnerability should focus on implementing comprehensive input validation and output encoding mechanisms. The system administrators should implement proper sanitization of all user inputs, particularly those that are rendered back to users in web interfaces. This includes implementing Content Security Policy headers to prevent unauthorized script execution and employing proper HTML escaping techniques for all dynamic content. The recommended approach involves validating noticeSubject input against a strict whitelist of acceptable characters and lengths, while also implementing automatic encoding of special characters that could be interpreted as HTML or JavaScript. Additionally, the system should implement proper session management controls and consider implementing rate limiting to prevent automated exploitation attempts. Security monitoring should be enhanced to detect unusual patterns in notice creation activities, and regular security audits should be conducted to identify similar vulnerabilities in other parts of the application. The remediation aligns with ATT&CK technique T1566 which involves the exploitation of web application vulnerabilities for initial access, making this a critical vulnerability requiring immediate attention.