Quick answers
- Is CVE-2026-81200 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-81200 being exploited in the wild.
- How severe is CVE-2026-81200?
- Low severity, with a CVSS score of 2.7, published 29 August 2026.
- Which products and versions are affected?
- MasterStudy MasterStudy LMS before 3.7.42.
- Is there a fix for CVE-2026-81200?
- A patch was published on 2026-08-29: Fixed in version 3.7.42 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-81200 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-81200?
- Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The vulnerability is an Insecure Direct Object Reference (IDOR) in the stm_lms_get_order_info AJAX action. The plugin checks for a valid nonce and session cookie but does not verify that the requesting instructor user owns or has permission to access the queried order. An authenticated instructor can iterate numeric order IDs and retrieve complete order records containing billing name, email, phone, address, city, postal code, and country. The attack requires a valid WordPress session and the nonce value (which is publicly embedded in page HTML for all logged-in users). The vulnerability was patched in version 3.7.42.
Affected products
- MasterStudy MasterStudy LMS before 3.7.42
Timeline
- 2026-08-27: disclosed
- 2026-08-29: patched: Fixed in version 3.7.42