CVE-2021-24186Known exploitationPublic exploitNetwork attack vector

Database disclosure via stored quiz-answer SQL injection

Published Apr 5, 2021 · Updated Aug 3, 2024

SQL injection in Themeum Tutor LMS before 1.8.3 allows remote authenticated users with student accounts to read WordPress database data. The tutor_answering_quiz_question path stores an unescaped quiz response, and get_answer_by_id later interpolates it into a get_results query. A valid student session and quiz submission are required; viewing the attempt details executes the stored UNION payload and returns selected database records.

CVSS severity8.8
High
EPSS probability1.25%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SQL injection in Themeum Tutor LMS before 1.8.3 allows remote authenticated users with student accounts to read WordPress database data. The tutor_answering_quiz_question path stores an unescaped quiz response, and get_answer_by_id later interpolates it into a get_results query. A valid student session and quiz submission are required; viewing the attempt details executes the stored UNION payload and returns selected database records.

The record

CVE
CVE-2021-24186
Published
Apr 5, 2021
Updated
Aug 3, 2024
Vendor
Themeum
Product
Tutor LMS
Classifications
CWE-89, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 5, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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=1.8.3 <1.8.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Themeum · Tutor LMSversion=1.8.3 <1.8.3

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
8.8WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
4.0NIST NVDAV:N/AC:L/Au:S/C:P/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
Privilegesauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-89Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
T1190Exploit Public-Facing Application

Public exploit references

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

Reported exploitation

Technologies

Your stack

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Your stack

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