CVE-2025-13004: Farktor E-commerce Auth Bypass Vulnerability

CVE-2025-13004 Overview

CVE-2025-13004 is an Authorization Bypass Through User-Controlled Key vulnerability [CWE-639] affecting the Farktor E-Commerce Package developed by Farktor Software E-Commerce Services Inc. The flaw allows authenticated attackers to manipulate user-controlled variables to access or modify resources belonging to other users. The issue affects all versions of the E-Commerce Package through build 27112025. Exploitation requires network access, low privileges, and user interaction, with high impact on data integrity.

Critical Impact
Authenticated attackers can tamper with user-controlled identifiers to bypass authorization checks, gaining unauthorized access to other users' records and modifying integrity-sensitive data within the e-commerce platform.

Affected Products

Farktor E-Commerce Package, all versions through 27112025
Deployments using the farktor:e-commerce_package component
Web-facing storefronts built on the Farktor platform

Discovery Timeline

2026-02-12 - CVE-2025-13004 published to NVD
2026-03-10 - Last updated in NVD database

Technical Details for CVE-2025-13004

Vulnerability Analysis

The vulnerability is an Insecure Direct Object Reference (IDOR) class flaw, categorized under [CWE-639]: Authorization Bypass Through User-Controlled Key. The Farktor E-Commerce Package exposes resource identifiers — such as user IDs, order IDs, or cart references — directly in request parameters without enforcing server-side authorization checks tied to the authenticated session.

An attacker with a valid low-privilege account can substitute another user's identifier in a request and obtain or modify that user's data. The vulnerability impacts data integrity heavily and also affects availability of targeted records. Confidentiality impact is rated as none in the assigned CVSS vector, indicating the primary risk surfaces as unauthorized modification rather than data exfiltration.

Root Cause

The root cause is missing or inadequate server-side authorization enforcement when processing requests that reference user-owned objects. The application trusts client-supplied keys to identify the target resource without verifying that the authenticated principal owns or is permitted to act on that resource. This pattern typically appears in account management endpoints, order lookup functions, and cart manipulation routes.

Attack Vector

Exploitation occurs over the network and requires the attacker to be authenticated and to induce a user interaction step. The attacker intercepts a legitimate request, modifies the user-controlled key — for example, an userId, orderId, or addressId parameter — and resubmits it. The server processes the request against the substituted identifier without re-checking ownership, exposing the target object to manipulation. No specialized tooling beyond a web proxy is required to produce a working exploit chain.

Detection Methods for CVE-2025-13004

Indicators of Compromise

Application access logs showing the same authenticated session accessing object identifiers belonging to multiple unrelated user accounts in a short window.
HTTP requests where path or body parameters such as userId, orderId, or customerId are iterated sequentially or substituted across sessions.
Unexpected modifications to order, address, or profile records without corresponding owner authentication events.

Detection Strategies

Correlate session identifiers with the user IDs referenced in request parameters and alert when they diverge.
Deploy Web Application Firewall (WAF) rules to flag parameter tampering patterns against Farktor endpoints handling user-owned resources.
Review audit trails for write operations on records that do not match the acting user's profile linkage.

Monitoring Recommendations

Enable verbose application logging for all endpoints accepting object identifiers in query strings or request bodies.
Forward web and application logs to a centralized analytics platform for behavioral baselining of per-user object access patterns.
Set alerting thresholds for rapid enumeration of numeric identifiers from a single account or IP.

How to Mitigate CVE-2025-13004

Immediate Actions Required

Apply the vendor-supplied update for the E-Commerce Package once released; the issue affects all builds through 27112025.
Audit application code paths that accept user, order, and cart identifiers from client input and enforce ownership checks server-side.
Restrict access to administrative and account-management endpoints behind additional authorization layers until patched.

Patch Information

As of publication, refer to the USOM Security Notification TR-26-0063 for the official advisory. Customers should contact Farktor Software E-Commerce Services Inc. directly for patched build availability and upgrade guidance for versions beyond 27112025.

Workarounds

Implement server-side authorization middleware that validates the authenticated session owns every referenced object before executing the requested action.
Replace sequential numeric identifiers with unguessable opaque tokens such as UUIDs to reduce enumeration feasibility.
Deploy WAF signatures that detect parameter substitution patterns and rate-limit identifier enumeration attempts.

bash

# Example WAF logic pseudocode for detecting IDOR enumeration
# Alert when a single session references >N distinct user IDs within a short window
if session.distinct_user_ids_seen(window="5m") > 5:
    block_and_alert(session_id, reason="Possible CVE-2025-13004 IDOR enumeration")