What the vulnerability does
01Description
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.
Explanation of Vulnerability in Simple Terms
02Summary
Download Monitor versions 5.1.7 and earlier contain an authorization bypass vulnerability. An attacker can modify file integrity or content without authentication. The vulnerability requires only network access and no user interaction. Site administrators should update to a version newer than 5.1.7 immediately.
What an attacker can do
03Attacker Capabilities
Modify or corrupt files and content on the site without logging in.
Potential impact on your site
04Site Impact
Attackers can alter downloads, metadata, or site files without permission or detection.
Conditions required to exploit
05Prerequisites
Network access only; no authentication or user interaction required.
Key dates
06Disclosure timeline
March 30, 2026
CVE published
April 8, 2026
Record updated
