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TI-2026-57153 Aliases CVE-2026-82849GHSA-cgmx-54pv-6c9x

Masteriyo LMS < 3.4.2 - Subscriber+ Arbitrary User Course Progress Disclosure via IDOR

Priority LOW 19CWE-639Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
Low · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-639.

Summary

The Masteriyo LMS WordPress plugin before 3.4.2 does not verify that the user making the request owns the course-progress records being returned, allowing any authenticated user, such as a self-registered subscriber, to read another user's learning activity. The ownership check it applies is skipped whenever the requested account is not named with a non-zero value, in which case the records of every learner on the site are returned at once.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00157 4th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed Masteriyo LMS (Unknown): 3.4.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
UnknownMasteriyo LMSbefore 3.4.23.4.2Patch availableCNA
  • Masteriyo LMS VendorUnknown Affected before 3.4.2 Fixed in 3.4.2 Patch available CNA

Remediation

  • Fix · CNA Masteriyo LMS (Unknown) Fixed in 3.4.2

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Masteriyo LMS 3.4.2

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2026-57154 Masteriyo LMS < 3.4.2 - Subscriber+ Quiz Answer Key DisclosurePriority LOW 19
    Show all 2 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-82849
  2. 2026-10-03 Alias added: GHSA-cgmx-54pv-6c9x

References

Exploit 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences