CVE-2026-66600Network attack vector

Author-level arbitrary file upload via undisclosed Settings tab

Published Aug 20, 2026 · Updated Aug 20, 2026

Unrestricted file upload in David Lingren Media Library Assistant 3.39 and earlier allows remote authenticated users to upload arbitrary files. The vendor identifies one Settings tab as the affected locus but has not published the request handler or validation operation that accepts dangerous file types. Author-level WordPress access is required, and uploaded backdoors can execute in the site context, exposing site data and control.

CVSS severity9.1
Critical
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Unrestricted file upload in David Lingren Media Library Assistant 3.39 and earlier allows remote authenticated users to upload arbitrary files. The vendor identifies one Settings tab as the affected locus but has not published the request handler or validation operation that accepts dangerous file types. Author-level WordPress access is required, and uploaded backdoors can execute in the site context, exposing site data and control.

The record

CVE
CVE-2026-66600
Published
Aug 20, 2026
Updated
Aug 20, 2026
Vendor
David Lingren
Product
Media Library Assistant
Classifications
CWE-434, CAPEC-17, T1105
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 20, 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 <=3.39 changes=[{"at":"3.40","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

David Lingren · Media Library Assistantversion=n/a <=3.39 changes=[{"at":"3.40","status":"unaffected"}]

Published CVSS scores

9.1PatchstackCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/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 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

CWE-434Unrestricted Upload of File with Dangerous Type
CAPEC-17Using Malicious Files
T1105Ingress Tool Transfer

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo