Quick answers
- Is CVE-2026-82848 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-82848 being exploited in the wild.
- How severe is CVE-2026-82848?
- Medium severity, with a CVSS score of 5.3, published 9 September 2026.
- Which products and versions are affected?
- Masteriyo LMS 1.3.1 to 2.3.3 (fixed in 3.4.0).
- Is there a fix for CVE-2026-82848?
- A patch was published on 2026-09-09: Fixed in version 3.4.0 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-82848 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-82848?
- 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 a broken access control flaw (CWE-862) in the Masteriyo LMS REST API endpoints for retrieving course enrollment records. The single-record endpoint `/masteriyo/v1/users/courses/{id}` lacks authorization checks, allowing unauthenticated attackers to retrieve any enrollment record by iterating sequential IDs—returning HTTP 200 with full enrollment status, timestamps, and per-lesson/quiz progress for valid IDs, and HTTP 404 for non-existent IDs, enabling straightforward enumeration. Additionally, the listing endpoint `/masteriyo/v1/users/courses` accepts a `user[]` parameter that allows any logged-in student to override the default self-scope and request other users' enrollment records. No authentication credentials, nonces, or API keys are required for the unauthenticated path. The fix is available in version 3.4.0 and later.
Affected products
- Masteriyo LMS 1.3.1 to 2.3.3 (fixed in 3.4.0)
Timeline
- 2026-09-07: disclosed
- 2026-09-09: advisory
- 2026-09-09: patched: Fixed in version 3.4.0