Download Monitor <= 5.1.7 - Insecure Direct Object Reference to Unauthenticated Arbitrary Order Completion via 'token' and 'order_id'

7.5
Authorization Bypass Through User-Controlled Key
CVE CVE-2026-3124
CVSS 7.5 (High)
Publicly Published March 29, 2026
Last Updated March 30, 2026
Researcher bashu - VN

Description

The Download Monitor plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 5.1.7 via the executePayment() function due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to complete arbitrary pending orders by exploiting a mismatch between the PayPal transaction token and the local order, allowing theft of paid digital goods by paying a minimal amount for a low-cost item and using that payment token to finalize a high-value order.

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Vulnerability Details for Download Monitor

Software Type Plugin
Software Slug download-monitor (view on wordpress.org)
Patched? Yes
Remediation Update to version 5.1.8, or a newer patched version
Affected Version
  • <= 5.1.7
Patched Version
  • 5.1.8

Recent vulnerabilities in Download Monitor

# Title CVE ID CVSS Researchers Date
1 Download Monitor <= 5.1.9 - Authenticated (Author+) Arbitrary File Download CVE-2026-39489 4.3 daroo April 20, 2026
2 Download Monitor <= 5.1.10 - Cross-Site Request Forgery to Download Path Deletion and Disabling CVE-2026-4401 5.4 Kirasec April 7, 2026
3 Download Monitor <= 5.1.8 - Authenticated (Contributor+) SQL Injection CVE-2026-39486 6.5 daroo March 25, 2026
4 Download Monitor <= 5.0.22 - Authenticated (Contributor+) Local File Inclusion CVE-2025-47439 8.8 João Pedro Soares de Alcântara May 7, 2025
5 Download Monitor <= 5.0.13 - Missing Authorization to Sensitive Information Exposure CVE-2024-10399 4.3 Trương Hữu Phúc (truonghuuphuc) October 29, 2024
6 Download Monitor <= 5.0.12 - Missing Authorization to API Key Manipulation CVE-2024-10092 4.3 Trương Hữu Phúc (truonghuuphuc) October 25, 2024
7 Download Monitor <= 5.0.9 - Missing Authorization to Authenticated (Subscriber+) Shop Enable CVE-2024-8552 4.3 Trương Hữu Phúc (truonghuuphuc) September 25, 2024
8 Download Monitor <= 4.9.13 - Missing Authorization CVE-2024-3269 5.4 Arkadiusz Hydzik May 29, 2024
9 Download Monitor <= 4.9.4 - Authenticated (Admin+) SQL Injection CVE-2024-30501 7.2 movrment January 8, 2024
10 Download Monitor <= 4.8.3 - Authenticated(Subscriber+) Arbitrary File Upload via upload_file CVE-2023-34007 8.8 Nguyen Anh Tien June 7, 2023

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