CVE-2026-8378Network attack vector

Subscriber-level stored XSS via unescaped renamed filename

Published Jun 23, 2026 · Updated Jun 23, 2026

Stored XSS in N-Media Frontend File Manager Plugin 23.6 and earlier allows remote authenticated users to execute script via filenames. The frontend file-rename endpoint stores a submitted filename as post meta without sanitizing it, and the admin File Manager listing renders that value without escaping. Subscriber-level access is sufficient to plant the payload, but execution requires an administrator to view the file management interface.

CVSS severity5.4
Medium
EPSS probability0.23%
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 N-Media Frontend File Manager Plugin 23.6 and earlier allows remote authenticated users to execute script via filenames. The frontend file-rename endpoint stores a submitted filename as post meta without sanitizing it, and the admin File Manager listing renders that value without escaping. Subscriber-level access is sufficient to plant the payload, but execution requires an administrator to view the file management interface.

The record

CVE
CVE-2026-8378
Published
Jun 23, 2026
Updated
Jun 23, 2026
Vendor
N-Media
Product
Frontend File Manager Plugin
Classifications
CWE-79
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 23, 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 <=23.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

N-Media · Frontend File Manager Pluginversion=0 <=23.6

Published CVSS scores

5.4CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/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 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')

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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