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CVE-2026-18439— Tutor LMS <= 4.0.7 - Authenticated (Custom+) Insecure Direct Object Reference to Arbitrary Quiz Question/Answer Modification and Deletion via 'payload' Parameter

一分钟漏洞结论

影响对象
themeum Tutor LMS – eLearning and online course solution
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。

The Tutor LMS – eLearning and online course solution plugin for WordPress is vulnerable to Insecure Direct Object Reference in versions up to, and including, 4.0.7 via the tutor_quiz_builder_save AJAX action due to missing validation that nested question_id, a

CVSS 4.3 · Medium EPSS 0.25% · P17

影响版本矩阵 1

厂商产品 版本范围状态
themeum Tutor LMS – eLearning and online course solution ≤ 4.0.7 affected
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一、 漏洞 CVE-2026-18439 基础信息

漏洞信息

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Vulnerability Title
Tutor LMS <= 4.0.7 - Authenticated (Custom+) Insecure Direct Object Reference to Arbitrary Quiz Question/Answer Modification and Deletion via 'payload' Parameter
来源: CVE Program / CVE List V5
Vulnerability Description
The Tutor LMS – eLearning and online course solution plugin for WordPress is vulnerable to Insecure Direct Object Reference in versions up to, and including, 4.0.7 via the tutor_quiz_builder_save AJAX action due to missing validation that nested question_id, answer_id, deleted_question_ids[], and deleted_answer_ids[] values in the submitted payload belong to a quiz/topic/course the requester is authorized to manage. The handler only validates the top-level course_id, topic_id, and (when supplied) payload['ID'], but the nested identifiers are passed straight into $wpdb->update/DELETE statements in QuizBuilder::save_questions(), QuizBuilder::save_question_answers(), and QuizBuilder::handle_delete(). This makes it possible for authenticated attackers, with Instructor-level access and above, to overwrite the content and re-parent arbitrary quiz questions/answers belonging to other instructors or administrators, and to delete arbitrary quiz question and answer rows.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
来源: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
来源: CVE Program / CVE List V5

受影响产品

厂商 产品 影响版本 CPE 订阅
themeum Tutor LMS – eLearning and online course solution 0 ~ 4.0.7 -

二、漏洞 CVE-2026-18439 的公开POC

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三、漏洞 CVE-2026-18439 的情报信息

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CVE-2026-18439 其他参考 (7)

IV. Related Vulnerabilities

Same product: Tutor LMS – eLearning and online course solution
Same vendor: themeum
Same weakness: CWE-639

V. Comments for CVE-2026-18439

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