CVE-2026-85571Network attack vector

Unauthorized post reparenting via unchecked course ownership

Published Oct 10, 2026 · Updated Oct 10, 2026

IDOR in Tutor LMS 4.0.5 through 4.1.0 allows remote authenticated users to reparent arbitrary posts via course ordering requests. The ordering handler changes post parents without verifying that the supplied posts belong to a course the requester manages. Instructor-level access permits taking another instructor's content into an attacker-controlled course or making published content unreachable.

CVSS severityUnavailable
Unscored
EPSS probability0.23%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

IDOR in Tutor LMS 4.0.5 through 4.1.0 allows remote authenticated users to reparent arbitrary posts via course ordering requests. The ordering handler changes post parents without verifying that the supplied posts belong to a course the requester manages. Instructor-level access permits taking another instructor's content into an attacker-controlled course or making published content unreachable.

The record

CVE
CVE-2026-85571
Published
Oct 10, 2026
Updated
Oct 10, 2026
Vendor
Themeum
Product
Tutor LMS
Classifications
CWE-639, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 10, 2026Record 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=4.0.5 <4.1.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Themeum · Tutor LMSversion=4.0.5 <4.1.1

Published CVSS scores

No CVSS assessment is available in this record.

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.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
T1565.001Stored Data Manipulation

Public exploit references

No public exploit references are available in this record.

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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