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TI-2026-00361 Aliases CVE-2026-0559GHSA-j7x7-gc84-q635

Cross-site scripting in StylemixThemes MasterStudy LMS WordPress Plugin – for Online…

Priority LOW 28CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

The MasterStudy LMS WordPress Plugin – for Online Courses and Education plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'stm_lms_courses_grid_display' shortcode in all versions up to, and including, 3.7.11 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00231 14th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

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
StylemixThemesMasterStudy LMS WordPress Plugin – for Online Courses and Educationup to 3.7.11—No fix listedCNA
  • MasterStudy LMS WordPress Plugin – for Online Courses and Education VendorStylemixThemes Affected up to 3.7.11 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:stylemixthemes:masterstudy_lms:*:*:*:*:*:*:*:*——StylemixThemes
  • cpe:2.3:a:stylemixthemes:masterstudy_lms:*:*:*:*:*:*:*:* Versions — — ·StylemixThemes

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-0559
  2. 2026-10-03 Alias added: GHSA-j7x7-gc84-q635

References

Other 2

  • TI-2024-01413 MasterStudy LMS WordPress Plugin – for Online Courses and Education <= 3.2.5 - Unauthenticated SQL Injection CVSS 3.1CRITICAL 9.8
  • TI-2022-00364 MasterStudy LMS < 2.7.6 - Unauthenticated Admin Account Creation CVSS 3.1CRITICAL 9.8
  • TI-2024-24620 WordPress Consulting Elementor Widgets plugin <= 1.3.0 - Remote Code Execution (RCE) vulnerability CVSS 3.1CRITICAL 9.9
  • TI-2023-02655 BookIt <= 2.3.7 - Authentication Bypass CVSS 3.1CRITICAL 9.8
  • TI-2024-05535 MasterStudy LMS < 3.3.24 - Privilege Escalation to Instructor CVSS 3.1CRITICAL 9.1
  • TI-2024-24618 WordPress Consulting Elementor Widgets plugin <= 1.3.0 - Unauthenticated Local File Inclusion vulnerability CVSS 3.1CRITICAL 9.8
See all 172 →

Sources

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