CVE-2024-33939Network attack vector

Unauthenticated course-progress disclosure via user-controlled REST key

Published May 19, 2025 · Updated Apr 28, 2026

Authorization bypass in Themeisle Masteriyo LMS 1.7.3 and earlier allows remote attackers to read other users' course progress via REST. A course-progress REST handler accepts a user-controlled record key without validating that the requested progress belongs to the requester. No authentication or user interaction is required; exposure is limited to course-progress data, with no reported ability to modify it.

CVSS severity5.3
Medium
EPSS probability0.93%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in Themeisle Masteriyo LMS 1.7.3 and earlier allows remote attackers to read other users' course progress via REST. A course-progress REST handler accepts a user-controlled record key without validating that the requested progress belongs to the requester. No authentication or user interaction is required; exposure is limited to course-progress data, with no reported ability to modify it.

The record

CVE
CVE-2024-33939
Published
May 19, 2025
Updated
Apr 28, 2026
Vendor
Query Solutions Ltd.
Product
Masteriyo LMS
Classifications
CWE-288, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 19, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=1.7.3 changes=[{"at":"1.7.4","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Query Solutions Ltd. · Masteriyo LMSversion=0 <=1.7.3 changes=[{"at":"1.7.4","status":"unaffected"}]

Published CVSS scores

5.3PatchstackCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-288Authentication Bypass Using an Alternate Path or Channel
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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