CVE-2026-5502Network attack vector

Course content manipulation via conditional authorization check

Published Apr 17, 2026 · Updated Apr 17, 2026

Missing authorization in Themeum Tutor LMS 3.9.8 and earlier allows remote authenticated users to manipulate any course content order. The tutor_update_course_content_order() handler checks can_user_manage() only when content_parent is supplied; omitting it sends ordering data to save_course_content_order() without authorization. Subscriber-level access is sufficient to detach lessons, move them between topics, or rewrite menu_order values in wp_posts, disrupting any course structure.

CVSS severity5.3
Medium
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in Themeum Tutor LMS 3.9.8 and earlier allows remote authenticated users to manipulate any course content order. The tutor_update_course_content_order() handler checks can_user_manage() only when content_parent is supplied; omitting it sends ordering data to save_course_content_order() without authorization. Subscriber-level access is sufficient to detach lessons, move them between topics, or rewrite menu_order values in wp_posts, disrupting any course structure.

The record

CVE
CVE-2026-5502
Published
Apr 17, 2026
Updated
Apr 17, 2026
Vendor
Themeum
Product
Tutor LMS
Classifications
CWE-862, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 17, 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=0 <=3.9.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Themeum · Tutor LMSversion=0 <=3.9.8

Published CVSS scores

5.3Wordfence IntelligenceCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/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.

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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 exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
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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