CVE-2025-68434: Open Source Point Of Sale CSRF Vulnerability

CVE-2025-68434 Overview

A Cross-Site Request Forgery (CSRF) vulnerability in Open Source Point of Sale (opensourcepos) allows unauthenticated remote attackers to perform unauthorized administrative actions by exploiting disabled CSRF protection. This web-based point of sale application, built on the CodeIgniter PHP framework, explicitly disabled its CSRF protection mechanism, enabling attackers to create rogue administrator accounts and achieve complete system takeover.

Critical Impact
Successful exploitation allows attackers to silently create new Administrator accounts with full privileges, leading to complete system compromise and loss of confidentiality, integrity, and availability.

Affected Products

Open Source Point of Sale versions 3.4.0 to prior to 3.4.2
opensourcepos:open_source_point_of_sale

Discovery Timeline

2025-12-17 - CVE-2025-68434 published to NVD
2025-12-18 - Last updated in NVD database

Technical Details for CVE-2025-68434

Vulnerability Analysis

This vulnerability stems from a fundamental security misconfiguration where CSRF protection was explicitly disabled in the application's filter configuration file (app/Config/Filters.php). Without CSRF token validation, the application processes state-changing POST requests without verifying their legitimacy or origin.

The attack scenario requires social engineering: an attacker hosts a malicious web page containing crafted form submissions targeting the opensourcepos application. When an authenticated administrator visits this malicious page, their browser automatically sends the forged requests to the application with the administrator's session cookies attached. Since no CSRF token verification occurs, the application accepts these requests as legitimate.

The most critical exploitation path involves creating a new Administrator account with full privileges. This grants the attacker persistent access to the system, enabling them to manipulate sales data, access financial records, modify inventory, extract customer information, and completely control the point of sale infrastructure.

Root Cause

The root cause is the explicit disabling of the CSRF filter in app/Config/Filters.php. The protection mechanism that should have validated CSRF tokens on all state-changing requests was commented out or removed, leaving the application vulnerable to cross-origin request attacks. This configuration oversight allowed the application to accept POST requests without any origin validation or token verification.

Attack Vector

The attack requires network access and user interaction. An attacker must craft a malicious webpage containing hidden forms or JavaScript that automatically submits requests to the vulnerable opensourcepos instance. The attack flow proceeds as follows:

Attacker identifies a target opensourcepos installation (versions 3.4.0 to 3.4.1)
Attacker creates a malicious HTML page with auto-submitting forms targeting the user creation endpoint
Attacker lures an authenticated administrator to visit the malicious page
The administrator's browser sends the forged request with valid session credentials
The application processes the request without CSRF validation, creating a new admin account
Attacker gains full administrative access to the point of sale system

The vulnerability is documented in the GitHub Security Advisory GHSA-wjm4-hfwg-5w5r. A proof-of-concept demonstrating the unauthorized administrator creation is available in the CVE-2025-68434 PoC Repository.

Detection Methods for CVE-2025-68434

Indicators of Compromise

Unexpected administrator accounts appearing in the system user list
User creation events in application logs without corresponding legitimate administrative sessions
Web server logs showing POST requests to user management endpoints from unusual referrer URLs
Access patterns indicating administrator actions occurring shortly after visits to external websites

Detection Strategies

Monitor application logs for user creation events, particularly administrator account creations
Implement web application firewall rules to detect cross-origin POST requests to sensitive endpoints
Review access logs for suspicious referrer headers on state-changing requests
Audit user accounts regularly for unauthorized administrator entries

Monitoring Recommendations

Enable detailed logging for all user management operations in opensourcepos
Configure alerting for new administrator account creation events
Monitor for unusual patterns in administrative session activity
Implement network traffic analysis to detect potential CSRF attack attempts

How to Mitigate CVE-2025-68434

Immediate Actions Required

Upgrade Open Source Point of Sale to version 3.4.2 or later immediately
Audit existing administrator accounts and remove any unauthorized entries
Review application logs for signs of previous exploitation
Force password resets for all legitimate administrator accounts as a precaution

Patch Information

The vulnerability has been patched in version 3.4.2. The fix re-enables the CSRF filter in app/Config/Filters.php and resolves associated AJAX race conditions by adjusting token regeneration settings. The security patch is documented in commit d575c8da9a1d7af8313a1e758e000e243f5614ef and the associated pull request #4349.

Workarounds

Administrators can manually re-enable the CSRF filter in app/Config/Filters.php by uncommenting the protection line; however, this may cause functionality issues in the Sales module due to token synchronization problems
Restrict network access to the opensourcepos application to trusted networks only
Implement a web application firewall with CSRF protection rules as an additional defense layer
Limit administrator access to dedicated secure workstations that minimize exposure to potentially malicious websites

The recommended approach is to apply the full patch rather than manual workarounds, as the patch addresses both the CSRF protection and the associated AJAX race conditions that can cause functionality breakage when CSRF is manually re-enabled.