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Media Library Assistant EUVDEUVD-2026-62210

| CVE-2026-66591 MEDIUM
Cross-site Scripting (XSS) (CWE-79)
2026-08-18 audit@patchstack.com GHSA-4v9h-c8v9-crhp
6.5
CVSS 3.1 · Vendor: patchstack
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Severity by source

Vendor (patchstack) PRIMARY
6.5 MEDIUM
AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
vuln.today AI
5.4 MEDIUM

PR:L confirmed by low-privilege upload requirement; A:N applied as XSS does not typically cause availability loss; all other metrics align with stored XSS affecting admin scope.

3.1 AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
4.0 AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

Primary rating from Vendor (patchstack).

CVSS VectorVendor: patchstack

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
Low

Lifecycle Timeline

1
Analysis Generated
Aug 19, 2026 - 05:08 vuln.today

DescriptionCVE.org

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in David Lingren Media LIbrary Assistant allows Stored XSS.

This issue affects Media LIbrary Assistant: from n/a through 3.39.

AnalysisAI

Stored cross-site scripting in the Media Library Assistant WordPress plugin (versions through 3.39) allows authenticated low-privileged users to inject persistent malicious scripts that execute in the browsers of other users - including administrators - who subsequently view affected media library pages. The Changed scope (S:C) in the CVSS vector confirms the payload escapes the plugin context and can affect the broader WordPress admin interface. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Recon
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Delivery
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Exploit
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Install
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C2
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Execute
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Impact
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Vulnerability AssessmentAI

Exploitation Exploitation requires an authenticated WordPress user with at minimum the Author or Contributor role (sufficient to upload media or edit attachment metadata), which limits risk on sites where user registration is closed or restricted to trusted parties. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS base score of 6.5 (Medium) reflects the combination of network reachability (AV:N), low complexity (AC:L), low privileges required (PR:L), required user interaction (UI:R), and Changed scope with low-magnitude C/I/A impacts. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Update the Media Library Assistant plugin to a version beyond 3.39 as soon as the vendor publishes a patched release - the Patchstack advisory at https://patchstack.com/database/wordpress/plugin/media-library-assistant/vulnerability/wordpress-media-library-assistant-plugin-3-39-cross-site-scripting-xss-vulnerability should be monitored for the confirmed fix version, as no exact patched version number was confirmed in the available data at the time of this analysis. … Detailed patch versions, workarounds, and compensating controls in full report.

Threat intelligence, references, and detailed analysis are available after sign-in.

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EUVD-2026-62210 vulnerability details – vuln.today

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