MasterStudy LMS accepts token payments for full-price course orders
MasterStudy LMS before 3.7.40 marks an order complete without verifying the payment amount, receiver, currency, or status. An unauthenticated buyer can pay a token amount, complete a full-price order, and gain access to paid course content.
- Component
- MasterStudy LMS WordPress Plugin
- Plugin slug
masterstudy-lms-learning-management-system- Affected
- < 3.7.40
- Safe version
3.7.40- Published
- Aug 29, 2026
This CVE was published Aug 29, 2026 and is one of 31 known issues for this plugin.
Update, patch or deactivate.
Update to 3.7.40 or later and reconcile completed course orders with payment-provider records before retaining access or fulfilment.
A safe version is available, so updating to that version or later is the preferred remediation. If an immediate update is not practical, consider a targeted application patch or temporarily restricting the affected functionality.
Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.
Technical description
The MasterStudy LMS WordPress Plugin WordPress plugin before 3.7.40 does not verify the amount, receiver, currency or status of a payment notification before marking the corresponding order completed, allowing unauthenticated users to complete full-price orders and gain access to paid content by paying only a token amount.
CVE / CNA vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N