CVE-2025-3536: Employee Management System Auth Bypass Flaw

CVE-2025-3536 Overview

CVE-2025-3536 is an improper authorization vulnerability in Tutorials-Website Employee Management System 1.0. The flaw resides in the /admin/delete-user.php script, where the ID parameter is processed without adequate authorization checks. Remote attackers can manipulate the ID argument to delete arbitrary user records without proper permissions. The exploit has been publicly disclosed, and the vendor did not respond to disclosure attempts. The vulnerability maps to [CWE-266] Incorrect Privilege Assignment and [CWE-639] Authorization Bypass Through User-Controlled Key.

Critical Impact
Unauthenticated remote attackers can delete user records in the Employee Management System by manipulating the ID parameter, resulting in data integrity loss and potential denial of service for legitimate users.

Affected Products

Tutorials-Website Employee Management System 1.0
Component: /admin/delete-user.php
CPE: cpe:2.3:a:tutorials-website:employee_management_system:1.0

Discovery Timeline

2025-04-13 - CVE-2025-3536 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-3536

Vulnerability Analysis

The vulnerability affects the delete-user functionality in the administrative section of the Employee Management System. The /admin/delete-user.php endpoint accepts an ID parameter that identifies which user account to remove. The application fails to properly validate whether the requester holds the necessary privileges to perform this action on the target record.

Because the authorization check is missing or improperly implemented, an attacker can supply arbitrary values in the ID parameter and trigger deletion of any user in the database. The attack requires no authentication and no user interaction. The exploit method has been publicly disclosed, which increases the likelihood of opportunistic scanning and abuse.

Root Cause

The root cause combines two weaknesses. [CWE-266] indicates incorrect privilege assignment, meaning the application does not enforce the privilege boundary expected for administrative actions. [CWE-639] describes authorization bypass through a user-controlled key, where the ID parameter is trusted as an authoritative selector without confirming the caller is entitled to operate on that record.

Attack Vector

An attacker crafts a remote HTTP request to /admin/delete-user.php and supplies an ID value pointing to a target user. Without authentication or session validation, the request is processed and the record is removed from the backend. Repeated requests can enumerate and delete additional user accounts, undermining the integrity and availability of the application.

No verified proof-of-concept code is provided in the public record beyond the referenced advisory. See the VulDB entry #304574 and the Web Security Insights write-up for additional technical context.

Detection Methods for CVE-2025-3536

Indicators of Compromise

Unauthenticated HTTP requests to /admin/delete-user.php containing an ID query parameter from external or unexpected source addresses.
Unexplained removal of user records in the Employee Management System database, particularly administrative accounts.
Web server access logs showing sequential or enumerated ID values against the delete-user endpoint.

Detection Strategies

Inspect web application logs for HTTP GET or POST requests targeting /admin/delete-user.php outside of authenticated administrator sessions.
Correlate application audit trails with authentication logs to identify user-deletion events that lack a corresponding admin login.
Deploy web application firewall (WAF) rules that flag or block requests to administrative endpoints without valid session cookies or referer headers.

Monitoring Recommendations

Enable database-level auditing for DELETE statements against the users table and alert on high-frequency deletions.
Continuously monitor the count of active user accounts and trigger alerts on abnormal drops.
Forward web server, application, and database logs to a centralized analytics platform for cross-source correlation.

How to Mitigate CVE-2025-3536

Immediate Actions Required

Restrict network access to the /admin/ directory using IP allowlisting, VPN, or reverse-proxy authentication until a code-level fix is available.
Disable or remove the delete-user.php endpoint if the delete-user functionality is not required in production.
Audit the users table for unauthorized deletions and restore missing accounts from backups where possible.

Patch Information

No vendor patch is available. The vendor did not respond to disclosure attempts according to the referenced advisory. Organizations running Tutorials-Website Employee Management System 1.0 should treat the application as unpatched and apply compensating controls or migrate to an alternative solution.

Workarounds

Add server-side authorization checks in delete-user.php that validate the current session belongs to an administrator before processing the ID parameter.
Implement indirect object references (session-bound tokens) instead of exposing raw database IDs in requests.
Place the application behind a WAF with rules that require authenticated sessions for any request to administrative paths.
Enforce CSRF tokens on all state-changing administrative endpoints to reduce cross-origin abuse risk.

bash

# Example nginx configuration restricting /admin to trusted networks
location /admin/ {
    allow 10.0.0.0/8;        # internal management network
    allow 192.168.100.0/24;  # admin VLAN
    deny  all;
    auth_basic "Restricted";
    auth_basic_user_file /etc/nginx/.htpasswd;
}