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TI-2026-56156 Aliases CVE-2026-81338GHSA-xc92-96mw-2hrx

MasterStudy LMS < 3.7.50 - Subscriber+ Stored HTML Injection via Course Discussions

Priority LOW 20CWE-345Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-345.

Summary

The MasterStudy LMS WordPress Plugin WordPress plugin before 3.7.50 does not properly sanitise and restrict HTML in user-submitted content before storing it and rendering it to other users, allowing users with subscriber-level accounts and above to perform stored HTML injection, such as embedding iframes, that can be leveraged for phishing and content spoofing against other users viewing the content.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00122 2nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed MasterStudy LMS WordPress Plugin (Unknown): 3.7.50

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
UnknownMasterStudy LMS WordPress Pluginbefore 3.7.503.7.50Patch availableCNA
  • MasterStudy LMS WordPress Plugin VendorUnknown Affected before 3.7.50 Fixed in 3.7.50 Patch available CNA

Remediation

  • Fix · CNA MasterStudy LMS WordPress Plugin (Unknown) Fixed in 3.7.50

Fixed in the same release

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

  • Release ·

    MasterStudy LMS WordPress Plugin 3.7.50

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2026-56157 MasterStudy LMS < 3.7.50 - Subscriber+ Quiz Attempt Grade Disclosure via IDORPriority LOW 20
    Show all 2 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-81338
  2. 2026-10-03 Alias added: GHSA-xc92-96mw-2hrx

References

Exploit 1

Sources

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