Subscriber-level paid course enrollment via unchecked AJAX
Published Jan 9, 2026 · Updated Jan 9, 2026
Missing authorization in Themeum Tutor LMS 3.9.3 and earlier allows remote authenticated users to enroll in paid courses without purchase. The course_enrollment() AJAX handler accepts a caller-supplied course ID and invokes enrollment without checking course purchasability or prior payment. Subscriber-level access and a valid AJAX nonce are sufficient to create an enrollment record and obtain course access while bypassing checkout.
Summary
What happened
Missing authorization in Themeum Tutor LMS 3.9.3 and earlier allows remote authenticated users to enroll in paid courses without purchase. The course_enrollment() AJAX handler accepts a caller-supplied course ID and invokes enrollment without checking course purchasability or prior payment. Subscriber-level access and a valid AJAX nonce are sufficient to create an enrollment record and obtain course access while bypassing checkout.
The record
- CVE
- CVE-2025-13934
- Published
- Jan 9, 2026
- Updated
- Jan 9, 2026
- Vendor
- Themeum
- Product
- Tutor LMS
- Classifications
- CWE-862
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jan 9, 2026CVE publishedPublication date reported by the CVE source.
- 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.
- Affected versionversion=* <=3.9.3
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
Public exploit references
- CVE-2025-13934 Tutor LMS proof of conceptproof of concept · demonstrated
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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