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TI-2026-57151 Aliases CVE-2026-82847GHSA-8hqp-p78r-mqpg

Masteriyo LMS < 3.4.1 - Instructor+ Stored XSS via Course Highlights

Priority LOW 32CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
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-79.

Summary

The Masteriyo LMS WordPress plugin before 3.4.1 does not sanitise and escape one of its course fields before outputting it back in the course editor, allowing users with the instructor role to perform Stored Cross-Site Scripting attacks against higher privileged users such as administrators.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00431 37th 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-2026-57149 Masteriyo LMS < 3.4.1 - Subscriber+ PHP Object InjectionPriority MEDIUM 44
    • 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-2026-82847
  2. 2026-10-03 Alias added: GHSA-8hqp-p78r-mqpg

References

Exploit 1

Sources

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