CVE-2026-65463Network attack vector

Subscriber resource alteration via user-controlled object key

Published Jul 23, 2026 · Updated Jul 23, 2026

Authorization bypass in ThemeGrill Masteriyo LMS 2.3.1 and earlier allows remote authenticated users to alter resources via object references. The published record identifies a user-controlled object key but does not disclose the endpoint, referenced object, or missing authorization operation. Subscriber access is required, and public evidence does not identify the altered resources or explain the reported service interruption.

CVSS severity5.4
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in ThemeGrill Masteriyo LMS 2.3.1 and earlier allows remote authenticated users to alter resources via object references. The published record identifies a user-controlled object key but does not disclose the endpoint, referenced object, or missing authorization operation. Subscriber access is required, and public evidence does not identify the altered resources or explain the reported service interruption.

The record

CVE
CVE-2026-65463
Published
Jul 23, 2026
Updated
Jul 23, 2026
Vendor
ThemeGrill
Product
Masteriyo LMS
Classifications
CWE-639, CAPEC-180, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 23, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=n/a <=2.3.1 changes=[{"at":"2.3.2","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ThemeGrill · Masteriyo LMSversion=n/a <=2.3.1 changes=[{"at":"2.3.2","status":"unaffected"}]

Published CVSS scores

5.4PatchstackCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
CAPEC-180Exploiting Incorrectly Configured Access Control Security Levels
T1565.001Stored Data Manipulation

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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