CVE-2026-82847Network attack vectorHinoki check available

Administrator-session script execution via course highlights

Published Sep 12, 2026 · Updated Sep 12, 2026

Stored XSS in Creative Motion Masteriyo LMS before 3.4.1 allows remote authenticated users to execute scripts through course highlights. The course editor outputs an instructor-controlled course highlight without sanitizing the stored value or escaping event-handler attributes. Instructor access and a higher-privileged user opening the affected course editor are required, and the script runs in that user's browser session.

CVSS severityUnavailable
Unscored
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Stored XSS in Creative Motion Masteriyo LMS before 3.4.1 allows remote authenticated users to execute scripts through course highlights. The course editor outputs an instructor-controlled course highlight without sanitizing the stored value or escaping event-handler attributes. Instructor access and a higher-privileged user opening the affected course editor are required, and the script runs in that user's browser session.

The record

CVE
CVE-2026-82847
Published
Sep 12, 2026
Updated
Sep 12, 2026
Vendor
Query Solutions Ltd.
Product
Masteriyo LMS
Classifications
T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 12, 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 <3.4.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Query Solutions Ltd. · Masteriyo LMSversion=0 <3.4.1

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.

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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

T1059.007JavaScript/JScript

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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