CVE-2026-3762: Client Database Management Auth Bypass

CVE-2026-3762 Overview

A vulnerability has been identified in SourceCodester Client Database Management System versions 1.0 and 3.1. The flaw exists within the /superadmin_delete_manager.php endpoint component, where improper handling of the manager_id argument leads to an authorization bypass vulnerability. This weakness allows remote attackers to manipulate authorization controls, potentially gaining unauthorized access to administrative functions.

Critical Impact

Remote attackers can exploit improper authorization controls in the superadmin endpoint to delete manager accounts without proper authentication, leading to unauthorized administrative actions and potential data loss.

Affected Products

• SourceCodester Client Database Management System 1.0
• SourceCodester Client Database Management System 3.1
• Lerouxyxchire Client Database Management System (all vulnerable versions)

Discovery Timeline

• 2026-03-08 - CVE CVE-2026-3762 published to NVD
• 2026-03-09 - Last updated in NVD database

Technical Details for CVE-2026-3762

Vulnerability Analysis

This vulnerability is classified as CWE-266 (Incorrect Privilege Assignment), which occurs when a product does not properly assign or manage privileges for users, allowing them to perform actions outside their intended authorization scope. In the case of Client Database Management System, the /superadmin_delete_manager.php endpoint fails to properly validate whether the requesting user has the necessary administrative privileges before processing manager deletion requests.

The vulnerability is network-accessible, meaning attackers can exploit it remotely without requiring any user interaction. The low attack complexity indicates that exploitation is straightforward once an attacker identifies the vulnerable endpoint.

Root Cause

The root cause of this vulnerability lies in the missing or inadequate authorization checks within the superadmin_delete_manager.php file. The application fails to verify that the user requesting the manager deletion operation has superadmin-level privileges before executing the action. The manager_id parameter is processed without validating the session or role of the requesting user, enabling unauthorized users to invoke administrative functions.

Attack Vector

The attack can be initiated remotely over the network by sending crafted HTTP requests to the vulnerable endpoint. An attacker can manipulate the manager_id parameter to target specific manager accounts for deletion without possessing valid superadmin credentials. Since the exploit has been publicly disclosed, organizations using this software are at increased risk of targeted attacks.

The vulnerability allows for unauthorized access with potential impacts on data confidentiality, integrity, and availability. An attacker could delete legitimate manager accounts, disrupt administrative workflows, or escalate their attack to gain further access to the system.

Detection Methods for CVE-2026-3762

Indicators of Compromise

• Unexpected HTTP requests to /superadmin_delete_manager.php from unauthenticated or low-privilege sessions
• Audit logs showing manager account deletions without corresponding superadmin login activity
• Anomalous patterns of DELETE or POST requests targeting administrative endpoints
• Missing manager records in the database without legitimate administrative actions

Detection Strategies

• Implement web application firewall (WAF) rules to monitor and alert on suspicious requests to /superadmin_delete_manager.php
• Enable detailed access logging for all administrative endpoints and correlate with authentication logs
• Deploy intrusion detection systems (IDS) to identify exploitation attempts targeting this endpoint
• Configure application-level logging to track all parameter manipulations on the manager_id field

Monitoring Recommendations

• Establish baseline metrics for legitimate superadmin activity and alert on deviations
• Monitor for unauthorized access patterns during off-hours or from unusual IP addresses
• Review database transaction logs for unexpected manager account modifications or deletions
• Implement real-time alerting for failed or anomalous authentication attempts against administrative functions

How to Mitigate CVE-2026-3762

Immediate Actions Required

• Restrict network access to the /superadmin_delete_manager.php endpoint using firewall rules or IP whitelisting
• Implement proper server-side authorization checks before processing any manager deletion requests
• Disable the vulnerable endpoint if not immediately required for business operations
• Conduct an audit of existing manager accounts to identify any unauthorized deletions

Patch Information

No official vendor patch has been released at this time. Organizations should monitor the SourceCodester website for security updates and patches. Additional technical details and proof-of-concept information can be found in the VulDB entry #349740 and the GitHub Gist PoC.

Workarounds

• Implement middleware-level authentication and authorization checks for all administrative endpoints
• Apply network segmentation to limit access to management interfaces from trusted networks only
• Configure reverse proxy rules to require additional authentication for sensitive endpoint access
• Consider deploying a web application firewall with custom rules to block unauthorized parameter manipulation

# Configuration example - Apache .htaccess to restrict endpoint access
<Files "superadmin_delete_manager.php">
    Order Deny,Allow
    Deny from all
    # Allow only from trusted admin network
    Allow from 10.0.1.0/24
    # Require additional authentication
    AuthType Basic
    AuthName "Restricted Admin Access"
    AuthUserFile /etc/apache2/.htpasswd
    Require valid-user
</Files>