CVE-2026-86267 in Information System Society Membership System
Summary
by MITRE • 09/07/2026
A security vulnerability has been detected in itsourcecode Information System Society Membership System 1.0. This issue affects some unknown processing of the file /society/check_student.php. The manipulation of the argument student_id leads to sql injection. Remote exploitation of the attack is possible. The exploit has been disclosed publicly and may be used.
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Analysis
by VulDB Data Team • 09/07/2026
The itsourcecode Information System Society Membership System version 1.0 contains a critical security flaw within its backend processing logic, specifically located in the file check_student.php. This vulnerability arises from an improper handling of user-supplied input, where the application fails to adequately sanitize or validate data before incorporating it into database queries. The specific parameter targeted by this weakness is student_id, which serves as a primary key for retrieving member information within the system's membership management module. Because the underlying code does not employ prepared statements with parameterized queries nor apply rigorous type casting and escaping mechanisms, an attacker can inject arbitrary SQL commands directly through this input field. This represents a classic instance of injection-based exploitation where the application interprets maliciously crafted data as executable database instructions rather than literal string values.
From a technical perspective, this flaw aligns closely with Common Weakness Enumeration identifier CWE-89, which categorizes improper neutralization of special elements used in an SQL command. The absence of input validation allows for blind or error-based SQL injection techniques to be executed remotely over the network. An attacker does not require prior authentication to exploit this vulnerability if the endpoint is publicly accessible without strict access controls on the specific script path. By manipulating the student_id argument, a malicious actor can bypass intended logic, extract sensitive data from the database such as user credentials and personal information, or potentially modify existing records depending on the privileges of the database account running the web application. The public disclosure of exploit code further lowers the barrier to entry for attackers, increasing the likelihood of automated scanning and exploitation attempts against any instance of this software that remains unpatched.
The operational impact of this vulnerability is severe, as it compromises the confidentiality, integrity, and potentially the availability of the system's data store. Successful exploitation can lead to unauthorized access to member profiles, exposure of sensitive personal identifiable information, and manipulation of membership records which could disrupt administrative operations. In more advanced scenarios, if the database service runs with elevated privileges or has network connectivity enabled, an attacker might leverage SQL injection techniques like out-of-band interactions or stacked queries to execute operating system commands on the server hosting the database. This transforms a simple data breach into a potential full system compromise, affecting not only the membership system but potentially other services hosted on the same infrastructure.
To mitigate this vulnerability, immediate remediation steps must be taken by developers and system administrators. The primary fix involves refactoring the check_student.php script to use parameterized queries or prepared statements provided by modern database interaction libraries such as PDO in PHP. This ensures that user input is treated strictly as data rather than executable code. Additionally, implementing strict input validation on the student_id field, ensuring it accepts only expected integer formats, adds a layer of defense-in-depth. Deploying a Web Application Firewall can also help detect and block common SQL injection patterns at the network perimeter while patches are applied. Regular security audits and static application security testing should be integrated into the development lifecycle to prevent similar issues in future releases.