CVE-2026-12273Public exploitNetwork attack vector

Subscriber-level auto-approved comments via unchecked AJAX target

Published Jul 13, 2026 · Updated Jul 13, 2026

Improper access control in Themeum Tutor LMS before 3.9.13 allows remote authenticated users to create auto-approved comments. The tutor_create_lesson_comment AJAX handler accepts an arbitrary comment_post_ID without authorization or target validation and inserts the comment with comment_approved set to 1. Subscriber-level access and a frontend nonce suffice; WordPress strips script tags but preserves permitted HTML links and bypasses moderation on any site content.

CVSS severity4.3
Medium
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in Themeum Tutor LMS before 3.9.13 allows remote authenticated users to create auto-approved comments. The tutor_create_lesson_comment AJAX handler accepts an arbitrary comment_post_ID without authorization or target validation and inserts the comment with comment_approved set to 1. Subscriber-level access and a frontend nonce suffice; WordPress strips script tags but preserves permitted HTML links and bypasses moderation on any site content.

The record

CVE
CVE-2026-12273
Published
Jul 13, 2026
Updated
Jul 13, 2026
Vendor
Themeum
Product
Tutor LMS
Classifications
CWE-284
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 13, 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 <3.9.13

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Themeum · Tutor LMSversion=0 <3.9.13

Published CVSS scores

4.3CISA-ADPCVSS: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-284Improper Access Control

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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