CVE-2026-5060Network attack vector

Arbitrary attachment deletion via unchecked file identifier

Published Jul 29, 2026 · Updated Jul 29, 2026

Authorization bypass in MasterStudy LMS 3.7.23 and earlier allows remote authenticated users to delete arbitrary WordPress attachments. The stm_lms_delete_cover() handler passes a user-controlled file_id to wp_delete_attachment() without verifying attachment ownership. Instructor-level access is sufficient to delete another user's attachment by enumerating sequential identifiers.

CVSS severity6.5
Medium
EPSS probability0.21%
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 MasterStudy LMS 3.7.23 and earlier allows remote authenticated users to delete arbitrary WordPress attachments. The stm_lms_delete_cover() handler passes a user-controlled file_id to wp_delete_attachment() without verifying attachment ownership. Instructor-level access is sufficient to delete another user's attachment by enumerating sequential identifiers.

The record

CVE
CVE-2026-5060
Published
Jul 29, 2026
Updated
Jul 29, 2026
Vendor
StylemixThemes
Product
MasterStudy LMS
Classifications
CWE-639, T1485
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 29, 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 <=3.7.23

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

StylemixThemes · MasterStudy LMSversion=0 <=3.7.23

Published CVSS scores

6.5WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/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 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
T1485Data Destruction

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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