CVE-2025-63711: Client Database Management System CSRF Flaw

CVE-2025-63711 Overview

A Cross-Site Request Forgery (CSRF) vulnerability exists in the SourceCodester Client Database Management System 1.0 that allows attackers to manipulate authenticated administrative users into performing unauthorized user deletion actions. The application's user deletion endpoint (superadmin_user_delete.php) accepts POST requests containing a user_id parameter without enforcing request origin validation or anti-CSRF tokens.

This vulnerability enables remote attackers to craft malicious web pages that, when visited by an authenticated administrator, trigger the deletion of arbitrary user accounts without the admin's knowledge or consent. The lack of proper authentication/authorization checks combined with missing CSRF protections creates a significant integrity and availability risk for organizations using this system.

Critical Impact

Unauthorized deletion of user accounts through CSRF attacks can lead to denial of service for legitimate users, disruption of business operations, and potential data loss in the Client Database Management System.

Affected Products

• Lerouxyxchire Client Database Management System version 1.0
• SourceCodester Client Database Management System

Discovery Timeline

• 2025-11-10 - CVE CVE-2025-63711 published to NVD
• 2025-11-17 - Last updated in NVD database

Technical Details for CVE-2025-63711

Vulnerability Analysis

This CSRF vulnerability stems from fundamental security design flaws in the application's request handling mechanism. The superadmin_user_delete.php endpoint processes user deletion requests without implementing any form of cross-site request forgery protection. Modern web applications should validate that state-changing requests originate from legitimate sources within the application, typically through synchronizer tokens, SameSite cookie attributes, or origin header validation.

The vulnerability is classified under CWE-352 (Cross-Site Request Forgery), which describes the failure to verify that web requests were intentionally submitted by the user who submitted them. In this case, the application blindly trusts any POST request containing a valid user_id parameter, regardless of its origin.

Root Cause

The root cause of this vulnerability is the complete absence of CSRF protection mechanisms in the user deletion endpoint. Specifically:

• No anti-CSRF tokens are generated or validated for state-changing operations
• The application does not verify the Origin or Referer headers to confirm request legitimacy
• Session authentication alone is insufficient to protect against cross-origin attacks
• The endpoint lacks SameSite cookie protections that would prevent cross-site request submission

Attack Vector

The attack is network-based and requires user interaction—specifically, an authenticated administrator must visit a malicious page crafted by the attacker. The attack flow involves:

1. The attacker identifies target user IDs within the Client Database Management System
2. The attacker creates a malicious HTML page containing a hidden form or JavaScript that automatically submits a POST request to superadmin_user_delete.php with the target user_id
3. The attacker lures an authenticated administrator to visit the malicious page (via phishing, social engineering, or embedding in a forum/comment)
4. When the administrator's browser loads the malicious page, the CSRF payload executes automatically
5. The browser includes the admin's session cookies with the forged request, authenticating the malicious deletion
6. The target user account is deleted without the administrator's knowledge or consent

A typical CSRF exploit for this vulnerability would involve an HTML form with hidden fields targeting the vulnerable endpoint, combined with JavaScript to auto-submit the form on page load, or an invisible iframe loading the malicious payload.

Detection Methods for CVE-2025-63711

Indicators of Compromise

• Unexpected user account deletions appearing in application or database logs
• HTTP POST requests to superadmin_user_delete.php with unusual or external Referer headers
• Multiple user deletion events occurring in rapid succession from the same administrator session
• Administrator complaints about actions they did not perform

Detection Strategies

• Implement web application firewall (WAF) rules to flag POST requests to sensitive endpoints with external Referer headers
• Enable detailed logging for all administrative actions including user deletions with full request metadata
• Deploy anomaly detection to identify unusual patterns of administrative activity
• Monitor for administrator sessions performing actions from unexpected geographic locations or IP addresses

Monitoring Recommendations

• Configure SIEM alerts for bulk user deletion events within short time windows
• Review access logs regularly for requests to superadmin_user_delete.php with suspicious origins
• Implement real-time alerting for administrative actions outside normal business hours
• Establish baseline metrics for normal administrative activity to detect anomalous behavior

How to Mitigate CVE-2025-63711

Immediate Actions Required

• Implement anti-CSRF tokens on all state-changing endpoints, particularly superadmin_user_delete.php
• Add SameSite=Strict or SameSite=Lax attribute to session cookies to prevent cross-site request inclusion
• Implement Origin and Referer header validation for administrative endpoints
• Consider implementing re-authentication or CAPTCHA challenges for destructive operations like user deletion

Patch Information

As of the last modification date (2025-11-17), no official vendor patch has been released for this vulnerability. Organizations should implement the workarounds below and monitor the GitHub CVE Research page and SourceCodester product page for security updates.

Workarounds

• Restrict access to administrative functions via IP whitelisting or VPN requirements
• Deploy a web application firewall (WAF) with CSRF protection rules enabled
• Train administrators to avoid clicking unknown links while authenticated to the management system
• Consider using browser extensions that isolate administrative sessions from general browsing
• Implement network segmentation to limit exposure of the administrative interface

# Apache .htaccess configuration to restrict admin endpoint access by IP
<Files "superadmin_user_delete.php">
    Order deny,allow
    Deny from all
    Allow from 192.168.1.0/24
    Allow from 10.0.0.0/8
</Files>