CVE-2026-14753 in stumasy
Summary
by MITRE • 07/05/2026
A vulnerability was detected in mjperpinosa stumasy up to 327d1b0f2915ba79d7ef8ebb74553e987609d9be. This impacts an unknown function of the file /PHP/objects/notes of the component Note Handler/Assignment Handler. Performing a manipulation of the argument assignment_item_id results in authorization bypass. The attack can be initiated remotely. The exploit is now public and may be used. Continious delivery with rolling releases is used by this product. Therefore, no version details of affected nor updated releases are available. The project was informed of the problem early through an issue report but has not responded yet.
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Analysis
by VulDB Data Team • 07/05/2026
This vulnerability resides within the mjperpinosa stumasy application, specifically affecting the Note Handler/Assignment Handler component where the flaw manifests in the /PHP/objects/notes file. The security issue stems from improper authorization checks when processing the assignment_item_id argument, creating a critical access control weakness that allows unauthorized users to bypass normal permission restrictions. The vulnerability represents a direct violation of the principle of least privilege and demonstrates a failure in the application's authentication and authorization mechanisms. According to CWE-285, this constitutes an authorization bypass vulnerability where the system fails to properly verify user permissions before granting access to protected resources.
The technical exploitation occurs through manipulation of the assignment_item_id parameter, which likely serves as a reference identifier for specific assignment records within the system. When this parameter is improperly validated or sanitized, attackers can forge requests that appear to originate from authorized users with elevated privileges. The remote attack vector means that malicious actors do not require physical access or local network presence to exploit this weakness, making it particularly dangerous in environments where the application is exposed to untrusted networks. This aligns with ATT&CK technique T1078 which describes valid accounts being used for lateral movement and privilege escalation.
The impact of this authorization bypass is severe as it allows attackers to access assignment records and potentially modify or manipulate student data without proper credentials. Given that this is a continuous delivery system with rolling releases, there are no clear version identifiers available to determine which specific releases contain the vulnerability or have been patched. This lack of version control information creates additional challenges for security professionals attempting to assess risk and implement appropriate mitigations. The public availability of the exploit increases the likelihood of widespread compromise across affected installations.
Organizations utilizing this application should immediately implement network segmentation to limit access to the vulnerable component, deploy web application firewalls with rules targeting parameter manipulation patterns, and conduct thorough access control reviews to identify any unauthorized modifications that may have occurred. Additionally, implementing automated monitoring for suspicious parameter usage and establishing a more robust version tracking system would help prevent similar issues in future releases. The lack of response from the project maintainers despite early notification highlights the importance of maintaining security communication channels with open source projects, as the continued exposure without patch availability represents a significant risk to user data integrity and system security.