CVE-2026-2983: Student Result Management Auth Bypass Flaw

CVE-2026-2983 Overview

A vulnerability has been identified in SourceCodester Student Result Management System 1.0 affecting the Bulk Import component. The vulnerability exists in an unknown function of the file /admin/core/import_users.php. Through manipulation of the File argument, attackers can bypass improper access controls, enabling unauthorized bulk account injection and arbitrary file upload. This vulnerability is remotely exploitable and the exploit has been publicly disclosed.

Critical Impact

Unauthenticated attackers can exploit improper access controls in the Bulk Import functionality to inject arbitrary user accounts or upload malicious files, potentially leading to complete system compromise.

Affected Products

• Munyweki Student Result Management System version 1.0

Discovery Timeline

• 2026-02-23 - CVE CVE-2026-2983 published to NVD
• 2026-02-24 - Last updated in NVD database

Technical Details for CVE-2026-2983

Vulnerability Analysis

This vulnerability is classified as CWE-266 (Incorrect Privilege Assignment), indicating that the application fails to properly restrict access to sensitive administrative functions. The Bulk Import feature located at /admin/core/import_users.php does not enforce proper authentication or authorization checks before processing user-supplied file uploads.

The vulnerability allows remote attackers to access administrative functionality without proper credentials. By exploiting the improper access controls on the File parameter, attackers can perform bulk account injection operations that should be restricted to authenticated administrators only. This effectively bypasses the intended security model of the application.

Root Cause

The root cause of this vulnerability is the absence of proper authentication and authorization validation in the /admin/core/import_users.php endpoint. The application fails to verify that the requesting user has administrative privileges before processing the bulk import operation. This represents a classic example of broken access control where server-side enforcement of access restrictions is missing or improperly implemented.

Attack Vector

The attack vector is network-based, requiring no authentication or user interaction. An attacker can directly access the vulnerable endpoint from a remote location. The exploitation process involves:

1. Directly accessing the /admin/core/import_users.php endpoint without authentication
2. Crafting a malicious file upload request manipulating the File parameter
3. Submitting bulk account data or malicious files through the unauthenticated endpoint
4. The system processes the request without verifying authorization, creating arbitrary user accounts or storing uploaded files

The vulnerability has been publicly documented in a GitHub PoC Repository which provides additional technical details about the exploitation methodology.

Detection Methods for CVE-2026-2983

Indicators of Compromise

• Unexpected HTTP requests to /admin/core/import_users.php from unauthenticated sessions or external IP addresses
• Creation of new user accounts without corresponding administrator activity logs
• Unusual file uploads to the server, particularly CSV or other bulk import file formats
• Web server access logs showing direct access to administrative endpoints without prior authentication

Detection Strategies

• Implement web application firewall (WAF) rules to monitor and block unauthenticated access attempts to /admin/core/ paths
• Configure intrusion detection systems (IDS) to alert on HTTP POST requests to the vulnerable endpoint from unknown sources
• Monitor user account creation events for anomalies such as bulk account creation or accounts with suspicious attributes
• Analyze web server logs for access patterns indicative of exploitation attempts targeting the Bulk Import functionality

Monitoring Recommendations

• Enable detailed logging for all administrative endpoints including /admin/core/import_users.php
• Set up alerts for any unauthenticated access to administrative functions
• Monitor file system changes in upload directories for unexpected file additions
• Implement baseline monitoring for user account creation rates to detect bulk injection attempts

How to Mitigate CVE-2026-2983

Immediate Actions Required

• Restrict access to the /admin/core/ directory using web server access controls or authentication mechanisms
• Implement network-level access controls to limit administrative endpoint access to trusted IP addresses only
• Consider temporarily disabling the Bulk Import functionality until a proper fix is implemented
• Review existing user accounts for any unauthorized entries that may have been created through exploitation

Patch Information

No official vendor patch has been identified for this vulnerability at the time of publication. Organizations using Munyweki Student Result Management System 1.0 should implement the workarounds described below and monitor SourceCodester for security updates. Additional vulnerability information is available through VulDB #347366.

Workarounds

• Add authentication checks to the /admin/core/import_users.php file to verify administrator session before processing requests
• Implement .htaccess or equivalent web server configuration to require authentication for the entire /admin/ directory
• Deploy a web application firewall to filter and block unauthorized requests to administrative endpoints
• Consider migrating to an actively maintained student management system with proper security controls

# Apache .htaccess configuration to restrict admin directory access
# Place this file in the /admin/ directory

AuthType Basic
AuthName "Administrator Access Required"
AuthUserFile /path/to/.htpasswd
Require valid-user

# Alternatively, restrict by IP address
# Order Deny,Allow
# Deny from all
# Allow from 192.168.1.0/24