CVE-2025-28168Public exploitNetwork attack vector

Authenticated arbitrary file upload via client-side validation

Published May 5, 2025 · Updated Aug 26, 2025

Unrestricted file upload in Multi Uploaders Multiple File Upload before 3.1.0 allows remote authenticated users to upload arbitrary files. The upload handler trusts the client-controlled supportedExtensions parameter and applies extension and size checks only in browser-side code. A valid upload session is required; request tampering permits disallowed or oversized files, enabling stored malicious content or resource exhaustion.

CVSS severity6.4
Medium
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in Multi Uploaders Multiple File Upload before 3.1.0 allows remote authenticated users to upload arbitrary files. The upload handler trusts the client-controlled supportedExtensions parameter and applies extension and size checks only in browser-side code. A valid upload session is required; request tampering permits disallowed or oversized files, enabling stored malicious content or resource exhaustion.

The record

CVE
CVE-2025-28168
Published
May 5, 2025
Updated
Aug 26, 2025
Vendor
Multi Uploaders
Product
Multiple File Upload
Classifications
CWE-602, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 5, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 26, 2025Record 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 <3.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Multi Uploaders · Multiple File Uploadversion=0 <3.1.0

Published CVSS scores

6.4MITRECVSS:3.1/AV:N/AC:L/PR:L/UI:N/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 exploitPublished

Weakness, pattern, technique

CWE-602Client-Side Enforcement of Server-Side Security
T1190Exploit Public-Facing Application

Public exploit references

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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