Tutor LMS <= 4.0.0 - Authenticated (Subscriber+) SQL Injection via Stored Quiz Answer Array

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Summary

CVECVE-2026-15022
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-16 09:16:17 UTC
Updated2026-07-16 13:39:36 UTC
DescriptionThe Tutor LMS – eLearning and online course solution plugin for WordPress is vulnerable to generic SQL Injection via Stored Quiz Answer Array in all versions up to, and including, 4.0.0 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated attackers, with custom-level access and above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database. The payload is stored at quiz-attempt time via the wp_ajax_tutor_quiz_abandon handler, but the injected SQL executes only when a privileged user or Tutor REST API key holder requests the /wp-json/tutor/v1/quiz-attempt-details/{id} endpoint, making this a second-order (stored) injection chain.

Risk And Classification

Primary CVSS: v3.1 6.5 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Problem Types: CWE-89 | CWE-89 CWE-89 Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
3.1CNADECLARED6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Themeum Tutor LMS ELearning And Online Course Solution affected 4.0.0 semver Not specified

References

ReferenceSourceLinkTags
plugins.trac.wordpress.org/browser/tutor/tags/3.9.9/classes/Quiz.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/tutor/tags/3.9.9/restapi/REST_Quiz.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/tutor/tags/3.9.13/classes/Quiz.php [email protected] plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/8cd603aa-c4d4-488c-b134-69832... [email protected] www.wordfence.com
plugins.trac.wordpress.org/browser/tutor/tags/3.9.13/classes/Quiz.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/tutor/tags/3.9.13/helpers/QueryHelper.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/tutor/tags/3.9.9/classes/Quiz.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/tutor/tags/3.9.13/restapi/REST_Quiz.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/tutor/tags/3.9.13/restapi/REST_Quiz.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/tutor/tags/3.9.9/helpers/QueryHelper.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/tutor/tags/3.9.9/restapi/REST_Quiz.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/tutor/tags/3.9.13/restapi/REST_Quiz.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/tutor/tags/3.9.9/restapi/REST_Quiz.php [email protected] plugins.trac.wordpress.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Supakiad S. (m3ez) (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-07-08T01:21:30.000ZVendor Notified
CNA2026-07-15T19:32:11.000ZDisclosed
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