CVE-2025-13935Public exploitNetwork attack vector

Unauthorized course completion via missing enrollment check

Published Jan 9, 2026 · Updated Jan 9, 2026

Missing authorization in Themeum Tutor LMS 3.9.2 and earlier allows remote authenticated users to complete any course without enrollment. Course::mark_course_complete accepts a caller-supplied course ID after checking only that the user is logged in, then records completion without calling is_enrolled. Subscriber-level WordPress access is sufficient; exploitation changes course completion and progress records but does not expose data or interrupt service.

CVSS severity4.3
Medium
EPSS probability0.22%
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 3.9.2 and earlier allows remote authenticated users to complete any course without enrollment. Course::mark_course_complete accepts a caller-supplied course ID after checking only that the user is logged in, then records completion without calling is_enrolled. Subscriber-level WordPress access is sufficient; exploitation changes course completion and progress records but does not expose data or interrupt service.

The record

CVE
CVE-2025-13935
Published
Jan 9, 2026
Updated
Jan 9, 2026
Vendor
Themeum
Product
Tutor LMS
Classifications
CWE-862, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 9, 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=* <=3.9.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Themeum · Tutor LMSversion=* <=3.9.2

Published CVSS scores

4.3WordfenceCVSS:3.1/AV:N/AC:L/PR:L/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 exploitPublished

Weakness, pattern, technique

CWE-862Missing Authorization
T1565.001Stored Data Manipulation

Public exploit references

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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