CVE-2026-73996Network attack vector

Unauthenticated arbitrary file upload

Published Aug 18, 2026 · Updated Aug 18, 2026

Unrestricted file upload in Themeisle Masteriyo LMS 2.3.2 and earlier allows remote attackers to upload arbitrary files without authentication. The published record does not identify the affected endpoint, handler, parameter, or missing file-type validation that accepts the upload. A reachable WordPress site with the plugin enabled is sufficient, and uploaded server-executable content can enable site takeover.

CVSS severity9.8
Critical
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in Themeisle Masteriyo LMS 2.3.2 and earlier allows remote attackers to upload arbitrary files without authentication. The published record does not identify the affected endpoint, handler, parameter, or missing file-type validation that accepts the upload. A reachable WordPress site with the plugin enabled is sufficient, and uploaded server-executable content can enable site takeover.

The record

CVE
CVE-2026-73996
Published
Aug 18, 2026
Updated
Aug 18, 2026
Vendor
Query Solutions Ltd.
Product
Masteriyo LMS
Classifications
CWE-434, CAPEC-650, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 18, 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=n/a <=2.3.2 changes=[{"at":"2.3.3","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Query Solutions Ltd. · Masteriyo LMSversion=n/a <=2.3.2 changes=[{"at":"2.3.3","status":"unaffected"}]

Published CVSS scores

9.8PatchstackCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
CAPEC-650Upload a Web Shell to a Web Server
T1190Exploit Public-Facing Application

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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