CVE-2025-3234Network attack vector

Authenticated dangerous-file upload via missing type validation

Published Jun 14, 2025 · Updated Apr 8, 2026

Arbitrary file upload in Ninja Team Filester 1.8.8 and earlier allows remote authenticated users to place dangerous files on the server. The file-manager upload path accepts files without validating their type, allowing server-executable content to pass its upload controls. Administrator privileges are normally required, but sites that extend file-manager access to lower roles also expose those users; code execution depends on server handling.

CVSS severity7.2
High
EPSS probability0.62%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Arbitrary file upload in Ninja Team Filester 1.8.8 and earlier allows remote authenticated users to place dangerous files on the server. The file-manager upload path accepts files without validating their type, allowing server-executable content to pass its upload controls. Administrator privileges are normally required, but sites that extend file-manager access to lower roles also expose those users; code execution depends on server handling.

The record

CVE
CVE-2025-3234
Published
Jun 14, 2025
Updated
Apr 8, 2026
Vendor
Ninja Team
Product
Filester
Classifications
CWE-434, T1105
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jun 14, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 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 <=1.8.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Ninja Team · Filesterversion=0 <=1.8.8

Published CVSS scores

7.2WordfenceCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/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.

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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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
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

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Your stack

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