CVE-2026-8653

MasterStudy LMS Pro Plus <= 4.8.20 - Authenticated (Instructor+) SQL Injection via 'columns' Parameter

Published Jun 4, 2026 CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed

Description

The MasterStudy LMS Pro Plus plugin for WordPress is vulnerable to generic SQL Injection via the 'columns' parameter in all versions up to, and including, 4.8.20 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated attackers, with instructor-level access or above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.

Analysis

Technical impact

The MasterStudy LMS Pro Plus plugin for WordPress contains a parameter‑based SQL injection flaw that allows an authenticated user with instructor‑level privileges or higher to modify the SQL query executed by the plugin. By supplying a crafted value to the 'columns' parameter, the attacker can inject additional SQL statements, enabling extraction of sensitive data such as user accounts, course content, or administrative credentials from the database.

Affected Systems

Affected systems are installations of the StylemixThemes MasterStudy LMS Pro WordPress plugin, versions up to and including 4.8.20. Any site running these versions of the plugin is vulnerable.

Risk and Exploitability

The CVSS score of 6.5 indicates a medium severity when combined with the requirement for instructor‑level access. EPSS data is not available, and the vulnerability is not listed in the CISA KEV catalog. Attackers would need to authenticate as an instructor or higher, which typically limits the exposed user base, but the ability to extract arbitrary database contents remains a serious concern when such access is compromised.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

StylemixThemes

MasterStudy LMS Pro

unaffected

Version	Status	Constraints
`0`	affected	≤ 4.8.20

No data.

Vendor Product Versions

Stylemixthemes

Masterstudy Lms

Version	Status	Scheme	Platform
`[0,4.8.20]`	affected	semver	—

Wordpress

Version	Status	Scheme	Platform
`—`	unaffected	—	—

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

Upgrade MasterStudy LMS Pro to version 4.8.21 or later
Restrict or remove unnecessary instructor‑level accounts from the WordPress site
Apply a web application firewall rule to filter or block malicious payloads targeting the 'columns' parameter
Review and harden user role permissions to minimize privileged accounts

Generated by OpenCVE AI on June 4, 2026 at 02:20 UTC.

Tracking

Advisories

No advisories available

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.217% probability within 30 days)

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://stylemixthemes.com/wordpress-lms-plugin/
https://www.wordfence.com/threat-intel/vulnerabilities/id/f24749a8-e01d-436a-9ec8-3745a6b5eecf?source=cve

History

Jun 5, 2026 8:00 AM First appearance in the feed. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Stylemixthemes Stylemixthemes masterstudy Lms Wordpress Wordpress wordpress
Vendors & Products		Stylemixthemes Stylemixthemes masterstudy Lms Wordpress Wordpress wordpress

Jun 4, 2026 3:15 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Jun 4, 2026 1:45 AM Description updated. Title updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		The MasterStudy LMS Pro Plus plugin for WordPress is vulnerable to generic SQL Injection via the 'columns' parameter in all versions up to, and including, 4.8.20 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated attackers, with instructor-level access or above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.
Title		MasterStudy LMS Pro Plus <= 4.8.20 - Authenticated (Instructor+) SQL Injection via 'columns' Parameter
Weaknesses		CWE-89
References		https://stylemixthemes.com/wordpress-lms-plugin/ https://www.wordfence.com/threat-intel/vulnerabilities/id/f24749a8-e01d-436a-9ec8-3745a6b5eecf?source=cve
Metrics		cvssV3_1 `{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'}`