CVE-2026-81026: CWE-284 Improper Access Control in MasterStudy LMS WordPress Plugin
Description
A vulnerability in the MasterStudy LMS WordPress Plugin before version 3.7.40 allows unauthenticated users to complete full-price orders by paying only a token amount. This occurs because the plugin does not properly verify payment notification details such as amount, receiver, currency, or status before marking orders as completed. This improper access control issue can lead to unauthorized access to paid content.
CVSS v3.1
Score 4.8medium
Affected software
MasterStudy LMS WordPress Plugin
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-81026 is an improper access control vulnerability (CWE-284) in the MasterStudy LMS WordPress Plugin versions prior to 3.7.40. The plugin fails to verify critical payment notification parameters before marking an order as completed. As a result, unauthenticated attackers can manipulate payment notifications to complete orders without paying the full price, thereby gaining unauthorized access to paid content.
Potential Impact
An attacker can bypass payment verification and complete full-price orders by submitting payment notifications with manipulated details. This leads to unauthorized access to paid content without proper payment, causing potential revenue loss and content exposure.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or patch link is provided, users should monitor the vendor's announcements and update the plugin once a fix is released. Until then, consider restricting access or disabling the plugin if feasible.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- WPScan
- Date Reserved
- 2026-08-26T15:19:45.263Z
- State
- PUBLISHED
Threat ID: 6a927abaacd9273b496bdf16
Added to database: 08/29/2026, 06:22:50 UTC
Last enriched: 09/09/2026, 21:53:26 UTC
Last updated: 10/13/2026, 18:48:24 UTC
Views: 127
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