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Masterstudy LmsWordPress extension · Stylemixthemes

CVE-2023-35093

MEDIUM · 6.5 CVSS v3.1 Published 2023-06-22
Fix available
A fix is available. Upgrade to after 3.0.8 or later.
See remediation →
71/100
Remediation priority · Elevated
Remotely reachable Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Broken Access Control vulnerability in StylemixThemes MasterStudy LMS WordPress Plugin – for Online Courses and Education plugin <= 3.0.8 versions allows any logged-in users, such as subscribers to view the "Orders" of the plugin and get the data related to the order like email, username, and more.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

The MasterStudy LMS WordPress plugin <= 3.0.8 lacks proper authorization checks on its Orders functionality, allowing any authenticated user with subscriber-level privileges to access sensitive order data including customer emails and usernames. This is a classic Broken Access Control / Insecure Direct Object Reference (IDOR) vulnerability where the plugin fails to verify if the requesting user has permission to view order information.

MitigationUpdate MasterStudy LMS plugin to version 3.0.9 or later which contains proper authorization controls. Until the update is applied, consider disabling new user registrations or auditing existing user accounts with subscriber roles.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Masterstudy LmsWordPress extension
Affected:<= 3.0.8

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Confirm MasterStudy LMS plugin is installed
    In WordPress admin, go to Plugins and locate MasterStudy LMS in the list of installed plugins
    Affected if Plugin is not installed, no further action needed
  2. Determine installed plugin version
    Click on the MasterStudy LMS plugin entry to view its details; note the version number shown in the plugin description
    Affected if Version is 3.0.8 or lower, indicating the vulnerable version
  3. Check if WordPress allows new user registration
    In WordPress admin, go to Settings > General and look for the 'Membership' setting 'Anyone can register' - verify whether it is checked or enabled
    Affected if User registration is enabled, allowing potential attacker to create a subscriber account
  4. Identify subscriber-level user accounts
    In WordPress admin, go to Users and filter by the Subscriber role, or query the wp_usermeta table for meta_value = 'subscriber'
    Affected if Any subscriber accounts exist in the system

Environment is affected if MasterStudy LMS plugin version 3.0.8 or lower is installed and WordPress has user registration enabled or already contains subscriber-level accounts, as these conditions enable exploitation of the authorization bypass in the Orders functionality

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to a release after 3.0.8
Interim mitigation

Update MasterStudy LMS plugin to version 3.0.9 or later which contains proper authorization controls. Until the update is applied, consider disabling new user registrations or auditing existing user accounts with subscriber roles.

Recommended fix Moderate confidence

MasterStudy LMS 3.0.9 or later

  1. Log in to the WordPress admin dashboard
  2. Navigate to Plugins > Installed Plugins
  3. Find MasterStudy LMS in the plugin list
  4. Click 'Update now' if an update is available, or manually download the latest version from WordPress.org
  5. After updating, verify that subscribers can no longer access order data by testing with a low-privilege user account
  6. Confirm the plugin is running version 3.0.9 or later

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Masterstudy Lms Scoped from the published advisory
  • Consultation2.0 h
  • Implementation1.0 h
  • Testing2.0 h
  • Review / QA1.0 h
6.0 hours of engineering $1,060
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,696.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2023-35093 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data