CVE-2023-3133Public exploitNetwork attack vector

Unauthenticated lesson disclosure via unchecked REST requests

Published Jul 4, 2023 · Updated Nov 21, 2024

Authorization bypass in Themeum Tutor LMS before 2.2.1 allows remote attackers to read restricted lesson data through the REST API. The lesson route uses a caller-supplied topic identifier to query every child lesson and returns titles, content, attachments, thumbnails, and video metadata without authenticating the request. The disclosure is exposed when course visibility requires login, allowing unauthenticated requests to retrieve otherwise restricted lesson resources.

CVSS severity7.5
High
EPSS probability0.98%
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 Themeum Tutor LMS before 2.2.1 allows remote attackers to read restricted lesson data through the REST API. The lesson route uses a caller-supplied topic identifier to query every child lesson and returns titles, content, attachments, thumbnails, and video metadata without authenticating the request. The disclosure is exposed when course visibility requires login, allowing unauthenticated requests to retrieve otherwise restricted lesson resources.

The record

CVE
CVE-2023-3133
Published
Jul 4, 2023
Updated
Nov 21, 2024
Vendor
Themeum
Product
Tutor LMS
Classifications
CWE-639, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 4, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 21, 2024Record 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 <2.2.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Themeum · Tutor LMSversion=0 <2.2.1

Published CVSS scores

7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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