Platform
wordpress
Component
download-monitor
Fixed in
5.1.8
CVE-2026-3124 is an Insecure Direct Object Reference vulnerability in the Download Monitor plugin for WordPress. This flaw allows unauthenticated attackers to complete arbitrary pending orders by exploiting a mismatch between the PayPal transaction token and the local order. This can lead to theft of paid digital goods. This affects Download Monitor versions up to and including 5.1.7. Version 5.1.8 contains a fix for this vulnerability.
CVE-2026-3124 poses a significant risk to WordPress sites utilizing the Download Monitor plugin. An unauthenticated attacker can exploit this Insecure Direct Object Reference (IDOR) vulnerability to complete arbitrary pending orders. The attack leverages a mismatch between a PayPal transaction token and the local order data within the executePayment() function. The attacker initiates a low-cost purchase to obtain a valid PayPal transaction token. Subsequently, they use this token to finalize a high-value order, effectively stealing the associated digital goods. For example, an attacker could pay $1 for a low-priced ebook and then use that payment token to claim a $100 software license. This vulnerability allows unauthorized access to paid content, leading to financial loss for the website owner and potentially damaging their reputation. The blast radius extends to any user who has purchased digital goods through the Download Monitor plugin, as their purchases are potentially vulnerable to this type of manipulation. The severity is amplified by the ease of initiating payments through PayPal and the relative simplicity of exploiting the token mismatch.
Currently, there are no publicly available exploitation reports or proof-of-concept (POC) code for CVE-2026-3124, according to available information. However, the vulnerability's nature – an IDOR affecting payment processing – makes it a high-priority concern. While no active exploitation is known, the potential for abuse is significant, and the ease of obtaining PayPal transaction tokens increases the likelihood of exploitation if a suitable POC is developed. The lack of public exploits does not diminish the urgency of patching, as attackers often develop exploits privately before widespread disclosure. The HIGH CVSS score (7.5) reflects the potential impact and relative ease of exploitation, even without current public evidence. Website administrators using Download Monitor should prioritize patching to prevent potential future exploitation.
Exploit Status
EPSS
0.04% (11% percentile)
CISA SSVC
CVSS Vector
The primary mitigation for CVE-2026-3124 is to immediately update the Download Monitor plugin to version 5.1.8 or later. This patched version includes the necessary validation to prevent the IDOR vulnerability. If upgrading is not immediately feasible, a temporary workaround involves implementing strict order validation checks on the server-side, verifying that the PayPal transaction token corresponds to the expected order details before finalizing any payment. This is a complex solution requiring custom code and careful testing to avoid disrupting legitimate transactions. It's crucial to thoroughly test any workaround in a staging environment before deploying it to production. After applying the update or workaround, verify the fix by attempting to manually trigger the payment completion process with an invalid PayPal token to ensure the validation is functioning correctly. Regular security audits and penetration testing are recommended to proactively identify and address potential vulnerabilities in WordPress plugins.
Update to version 5.1.8, or a newer patched version
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CVE-2026-3124 is an Insecure Direct Object Reference (IDOR) vulnerability in the Download Monitor plugin for WordPress that allows unauthenticated attackers to complete arbitrary pending orders.
You are affected if you are using Download Monitor version 5.1.7 or earlier.
Update the Download Monitor plugin to version 5.1.8 or later to resolve this vulnerability.
There are currently no public exploitation reports or proof-of-concept code available.
Refer to the National Vulnerability Database (NVD) entry for CVE-2026-3124: https://nvd.nist.gov/vuln/detail/CVE-2026-3124
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