CVE-2026-3371

Home/CVE/The Tutor LMS - eLearning and online course solution plugin for WordPress is vulnerable to Insecure Direct Object Refere

CVE

↯ PDF report Light Dark

The Tutor LMS - eLearning and online course solution plugin for WordPress is vulnerable to Insecure Direct Object Refere

The Tutor LMS - eLearning and online course solution plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 3.9.7. This is due to missing authorization checks in the save_course_content_order() private method, which is called unconditionally by the tutor_update_course_content_order AJAX handler. While the handler's content_parent branch includes a can_user_manage() check, the save_course_content_order() call processes attacker-supplied tutor_topics_lessons_sorting JSON without any ownership or capability verification.

This makes it possible for authenticated attackers with Subscriber-level access or above to detach lessons from topics, reorder course content, and reassign lessons between topics in any course, including admin-owned courses, by sending a crafted AJAX request with manipulated topic and lesson IDs.

MEDIUM · CVSS 4.3 EPSS 0.00012

EPSS exploitation odds0.01% · top 98%

Monitor

No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence

No Sigma yet — build one → YARA rules0

Look this up elsewhere - one-click external pivots

NVD CVE.org CISA Exploit-DB GitHub PoC VulnCheck KEV GreyNoise

▸ How to read a CVE - triage first, then detect and patch

This page is every public fact about CVE-2026-3371, cross-linked. Its job is to answer one question fast - does this need my attention now? - and then hand you the two things you do about it. Here is how an analyst reads it.

Triage: should I act now? Four signals, and they are not interchangeable:

CVSSseverity - how bad it is IF exploited, 0-10. A high CVSS alone is not urgency; a flaw can be a perfect 10 and never actually be attacked. EPSSprobability - a model’s estimate of the chance it is exploited in the next 30 days, 0-1. This is the “will it actually happen” signal. CISA KEVconfirmed - it is being exploited in the wild right now. The strongest signal on the page; KEV beats any score. Weaponisedavailability - public exploits / PoCs, and especially Metasploit modules rated Excellent / Great. Reliable, packaged exploit code means low-skill attackers can use it today.

How they combine: KEV, or a dependable Metasploit module, means patch now regardless of CVSS. High CVSS + low EPSS + no exploit is real but not an emergency - schedule it. Low CVSS but KEV-listed still gets patched now. The verdict above already weighed these for you; this is how it got there.

Then what - two workflows:

Detectwhen you cannot patch today, follow this CVE to the ATT&CK techniques it enables, then Build a SIEM detection (the green button) - author a rule, test it in Atomic, deploy it. That buys visibility while the patch waits. PatchAffected products / packages tell you if you are exposed; Fixed versions by distribution and Vendor advisories give the exact version that closes it.

Reading order for the panels below: verdict + badges, then Public exploits / Metasploit (is it weaponised), then ATT&CK techniques + Sigma / IDS rules (can I detect it), then Affected products / packages + Fixed versions (am I exposed, what patches it), then Threat actors / IOCs (who uses it), then Scoring & timeline / references (the evidence).

▣

Severity & exploitation scoring

View on NVD →

CVSS base score

4.3

MEDIUMCVSS v3.1 · [email protected]

EPSS exploitation probability

0.01%

Top 98%odds of exploitation in the next 30 days

CVSS metric silhouette

shape grows toward worst-case

SSVC triage · cisa-vulnrichment

Exploitation

none

Automatable

Tech impact

partial

CVSS vector breakdown

Exploitability - how they get in

Attack Vector

Network Adjacent Local Physical

Attack Complexity

Low High

Privileges Required

None Low High

User Interaction

None Required

Scope

Unchanged Changed

Impact - what breaks

Confidentiality

None Low High

Integrity

None Low High

Availability

None Low High

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

Lifecycle

11 Apr 2026Published to NVD
24 Apr 2026Last modified

Every entry is a recorded date - NVD publish/modify, CISA KEV add, public exploit disclosure. No inferred events.

View attack path from CVE-2026-3371

◆

ATT&CK techniques

Techniques this CVE enables - linked via CWE → CAPEC → ATT&CK. Pills with a solid outline are named directly in ATT&CK or Nuclei templates (high confidence); the others are linked through weakness mappings.

T1078 · Valid Accounts

▤ Build a SIEM detection for these techniques

⬡

Weakness Classification

CWE-639Authorization Bypass Through User-Controlled Key

▤

Related CVEs

CVEs linked to this one by a shared weakness (CWE) or affected product - joins on data already in the engine, with the reason shown per row. Not a guess.

CVE-2012-5571 A flaw was found in OpenStack Keystone. This vulnerability allows remote authent... same CWE-639 MEDIUM CVE-2014-8356 The web administrative portal in Zhone zNID 2426A before S3.0.501 allows remote ... same CWE-639 HIGH CVE-2016-20033 Wowza Streaming Engine 4.5.0 contains a local privilege escalation vulnerability... same CWE-639 HIGH CVE-2017-0882 Multiple versions of GitLab expose sensitive user credentials when assigning a u... same CWE-639 MEDIUM

🔗

References & Sources

Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.

https://plugins.trac.wordpress.org/browser/tutor/trunk/classes/Course.php#L1687

https://plugins.trac.wordpress.org/browser/tutor/trunk/classes/Course.php#L1755

https://plugins.trac.wordpress.org/browser/tutor/trunk/classes/Course.php#L252

https://plugins.trac.wordpress.org/changeset?old_path=%2Ftutor/tags/3.9.7&new_path=%2Ftutor/tags/3.9.8

https://www.wordfence.com/threat-intel/vulnerabilities/id/f9cf0430-8577-449a-aefe-d7bf606fe2de?source=cve