CVE-2025-47939Network attack vector

Authenticated service interruption via unrestricted file uploads

Published May 20, 2025 · Updated May 20, 2025

Unrestricted file upload in TYPO3 CMS allows remote authenticated users to store potentially harmful files through backend file management. ResourceStorage's addFile, renameFile, replaceFile, and addUploadedFile paths accepted extensions outside an allowlist and did not reject mismatches between a filename extension and detected MIME type. Backend access or another File Abstraction Layer integration is required; stored files are not web-executable, but security services can flag or block the site.

CVSS severity5.4
Medium
EPSS probability0.17%
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 TYPO3 CMS allows remote authenticated users to store potentially harmful files through backend file management. ResourceStorage's addFile, renameFile, replaceFile, and addUploadedFile paths accepted extensions outside an allowlist and did not reject mismatches between a filename extension and detected MIME type. Backend access or another File Abstraction Layer integration is required; stored files are not web-executable, but security services can flag or block the site.

The record

CVE
CVE-2025-47939
Published
May 20, 2025
Updated
May 20, 2025
Vendor
in2code GmbH
Product
TYPO3 CMS
Classifications
CWE-434, CWE-351, T1105
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 20, 2025CVE publishedPublication date reported by the CVE source.
  2. May 20, 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=>= 10.0.0, < 10.4.50
  2. Affected versionversion=>= 11.0.0, < 11.5.44
  3. Affected versionversion=>= 12.0.0, < 12.4.31
  4. Affected versionversion=>= 13.0.0, < 13.4.12
  5. Affected versionversion=>= 9.0.0, < 9.5.51

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

in2code GmbH · TYPO3 CMSversion=>= 10.0.0, < 10.4.50; version=>= 11.0.0, < 11.5.44; version=>= 12.0.0, < 12.4.31; version=>= 13.0.0, < 13.4.12; version=>= 9.0.0, < 9.5.51

Published CVSS scores

5.4GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
CWE-351Insufficient Type Distinction
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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