CVE-2026-15009Network attack vectorHinoki check available

Administrator-session script execution via prefix-matched postMessage origin

Published Aug 16, 2026 · Updated Aug 16, 2026

Reflected cross-site scripting in Advanced File Manager through 5.4.12 allows remote attackers to execute script via crafted postMessage data. The elFinder.js message handler treats any sender origin that is a leading prefix of the WordPress backend URL as trusted, then passes the untrusted soundFile value into audio-generating markup without safe output encoding. Exploitation requires control of a lookalike origin and an authenticated WordPress administrator to visit it while the File Manager screen is open, exposing the administrator session to injected JavaScript actions.

CVSS severity6.1
Medium
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Reflected cross-site scripting in Advanced File Manager through 5.4.12 allows remote attackers to execute script via crafted postMessage data. The elFinder.js message handler treats any sender origin that is a leading prefix of the WordPress backend URL as trusted, then passes the untrusted soundFile value into audio-generating markup without safe output encoding. Exploitation requires control of a lookalike origin and an authenticated WordPress administrator to visit it while the File Manager screen is open, exposing the administrator session to injected JavaScript actions.

The record

CVE
CVE-2026-15009
Published
Aug 16, 2026
Updated
Aug 16, 2026
Vendor
Fullworks Plugins
Product
Advanced File Manager
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 16, 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 <=5.4.12

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Fullworks Plugins · Advanced File Managerversion=0 <=5.4.12

Published CVSS scores

6.1WordfenceCVSS:3.1/AV:N/AC:L/PR:N/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.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

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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