CVE-2022-39019Network attack vector

Malicious file upload via unauthenticated WebviewerUI

Published Oct 31, 2022 · Updated May 2, 2025

Unrestricted file upload in M-Files Hubshare before 3.3.11.3 allows remote attackers to place malicious files on the application server. The PDFtron WebviewerUI upload path accepts attacker-supplied files without enforcing authentication or adequate access controls. No account is required, but the CNA user-interaction metric indicates that another user must interact with the uploaded content; published sources do not describe execution or file-system reach.

CVSS severity6.3
Medium
EPSS probability0.39%
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 M-Files Hubshare before 3.3.11.3 allows remote attackers to place malicious files on the application server. The PDFtron WebviewerUI upload path accepts attacker-supplied files without enforcing authentication or adequate access controls. No account is required, but the CNA user-interaction metric indicates that another user must interact with the uploaded content; published sources do not describe execution or file-system reach.

The record

CVE
CVE-2022-39019
Published
Oct 31, 2022
Updated
May 2, 2025
Vendor
M-Files
Product
M-Files Hubshare
Classifications
CWE-287, CWE-434, CAPEC-17, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 31, 2022CVE publishedPublication date reported by the CVE source.
  2. May 2, 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=3.3.1.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

M-Files · M-Files Hubshareversion=3.3.1.6

Published CVSS scores

6.3The Missing Link AustraliaCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-287Improper Authentication
CWE-434Unrestricted Upload of File with Dangerous Type
CAPEC-17Using Malicious Files
T1190Exploit Public-Facing Application

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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