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TI-2026-57149 Aliases CVE-2026-82845GHSA-mv63-gmf8-5x76

Masteriyo LMS < 3.4.1 - Subscriber+ PHP Object Injection

Priority MEDIUM 44CWE-502Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-502.

Summary

The Masteriyo LMS WordPress plugin before 3.4.1 does not prevent user-supplied values held as metadata from being deserialized when they are read back, allowing users with a minimal account to inject arbitrary PHP objects and, by way of a class shipped in a library bundled with the Masteriyo LMS WordPress plugin before 3.4.1, write and execute arbitrary code on the server. A weaker form of the same issue is reachable without an account and yields an arbitrary file write rather than code execution.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00638 50th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed Masteriyo LMS (Unknown): 3.4.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

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 3.4.13.4.1Patch availableCNA
  • Masteriyo LMS VendorUnknown Affected before 3.4.1 Fixed in 3.4.1 Patch available CNA

Remediation

  • Fix · CNA Masteriyo LMS (Unknown) Fixed in 3.4.1

Fixed in the same release

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

  • Release ·

    Masteriyo LMS 3.4.1

    3 records Highest priority Priority MEDIUM 1 MEDIUM, 2 LOW

    Other records, highest priority first

    • TI-2026-57151 Masteriyo LMS < 3.4.1 - Instructor+ Stored XSS via Course HighlightsPriority LOW 32
    • TI-2026-57155 Masteriyo LMS 1.14.0 - 3.4.0 - Instructor+ Arbitrary Post Disclosure via IDORPriority LOW 13
    Show all 3 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-82845
  2. 2026-10-03 Alias added: GHSA-mv63-gmf8-5x76
  3. 2026-10-25 EPSS moved to the 50th–90th percentile

References

Exploit 1

Sources

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