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    CVE-2025-13766

    The MasterStudy LMS WordPress Plugin – for Online Courses and Education plugin for WordPress is vulnerable to unauthorized modification and deletion of data due to a missing capability checks on multiple REST API endpoints in all versions up to, and including, 3.7.6. This makes it possible for authenticated attackers, with Subscriber-level access and above, to upload or delete arbitrary media files, delete or modify posts, and create/manage course templates

    Published:Jan 6, 2026
    Last Modified:Apr 22, 2026
    EPS:Jan 6, 2026
    EPSS Score:0.00037
    CVSS Score:5.4

    Affected Products

    Vendor
    Stylemix
    Product
    Masterstudy Lms Wordpress Plugin
    Vendor
    Wordpress
    Product
    Wordpress

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-862 Missing Authorization

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-665 Exploitation of Thunderbolt Protection Flaws

    Related CVEs

    CVE-2026-81199 (CVSS 5.3) — The MasterStudy LMS WordPress Plugin WordPress plugin before 3.7.46 does not perform an authorization check b…
    CVE-2026-81198 (CVSS 3.8) — The MasterStudy LMS WordPress Plugin WordPress plugin before 3.7.46 does not properly verify ownership of a c…
    CVE-2026-81197 (CVSS 5.3) — The MasterStudy LMS WordPress Plugin WordPress plugin before 3.7.46 does not restrict access to a REST route …
    CVE-2026-81196 (CVSS 2.7) — The MasterStudy LMS WordPress Plugin WordPress plugin before 3.7.46 does not properly verify ownership of qui…
    CVE-2026-81195 (CVSS 5.3) — The MasterStudy LMS WordPress Plugin WordPress plugin before 3.7.46 does not perform an authorization check b…
    CVE-2026-81194 (CVSS 4.3) — The MasterStudy LMS WordPress Plugin WordPress plugin before 3.7.46 does not properly verify authorization wh…
    CVE-2026-81342 (CVSS 4.7) — The MasterStudy LMS WordPress Plugin WordPress plugin before 3.7.43 does not validate a redirect parameter su…
    CVE-2026-81200 (CVSS 2.7) — The MasterStudy LMS WordPress Plugin WordPress plugin before 3.7.42 does not correctly restrict access to ord…
    CVE-2026-81026 (CVSS 4.8) — The MasterStudy LMS WordPress Plugin WordPress plugin before 3.7.40 does not verify the amount, receiver, cur…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High