CVE-2023-41108Public exploitNetwork attack vector

Authenticated code execution via dangerous file upload

Published Sep 5, 2023 · Updated Sep 30, 2024

Unrestricted file upload in TEF Portal 2023-07-17 allows remote authenticated users to execute code through an uploaded handler. The Aenderungsdienst upload blocks .asp and .aspx but accepts .ashx files, which the underlying IIS server executes as handlers. A valid portal session and upload access are required; successful exploitation compromises the web server and application data.

CVSS severity8.8
High
EPSS probability1.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

Unrestricted file upload in TEF Portal 2023-07-17 allows remote authenticated users to execute code through an uploaded handler. The Aenderungsdienst upload blocks .asp and .aspx but accepts .ashx files, which the underlying IIS server executes as handlers. A valid portal session and upload access are required; successful exploitation compromises the web server and application data.

The record

CVE
CVE-2023-41108
Published
Sep 5, 2023
Updated
Sep 30, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-184, CWE-434, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 5, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 30, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/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.

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 exploitPublished

Weakness, pattern, technique

CWE-184Incomplete List of Disallowed Inputs
CWE-434Unrestricted Upload of File with Dangerous Type
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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