CVE-2026-66601Network attack vector

Subscriber-level script execution via stored input

Published Aug 20, 2026 · Updated Aug 20, 2026

Stored XSS in David Lingren Media Library Assistant 3.39 and earlier allows remote authenticated users to run scripts in victim browsers. The CNA maps the issue to stored XSS, but neither Patchstack nor the upstream changelog discloses the affected endpoint, input parameter, or rendering sink. Subscriber access and victim interaction are required; script execution occurs in the site's origin and can affect data or actions available to the victim.

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

Stored XSS in David Lingren Media Library Assistant 3.39 and earlier allows remote authenticated users to run scripts in victim browsers. The CNA maps the issue to stored XSS, but neither Patchstack nor the upstream changelog discloses the affected endpoint, input parameter, or rendering sink. Subscriber access and victim interaction are required; script execution occurs in the site's origin and can affect data or actions available to the victim.

The record

CVE
CVE-2026-66601
Published
Aug 20, 2026
Updated
Aug 20, 2026
Vendor
David Lingren
Product
Media Library Assistant
Classifications
CWE-79, CAPEC-592, T1059.007
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

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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 <=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

6.5PatchstackCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/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 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-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-592Stored XSS
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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