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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.

PUBLISHED Reserved 2026-02-24 | Published 2026-03-30 | Updated 2026-04-08 | Assigner Wordfence




HIGH: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Problem types

CWE-639 Authorization Bypass Through User-Controlled Key

Product status

Default status
unaffected

Any version
affected

Timeline

2026-02-24:Vendor Notified
2026-03-29:Disclosed

Credits

Hung Nguyen finder

References

www.wordfence.com/...-6866-44e6-85c2-5be984afbbc9?source=cve

plugins.trac.wordpress.org/...geset/3470119/download-monitor

cve.org (CVE-2026-3124)

nvd.nist.gov (CVE-2026-3124)

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