Arbitrary Content Injection Vulnerability in TwinCAT 3 HMI Server by Beckhoff
CVE-2025-41768

5.5MEDIUM

Key Information:

Vendor

Beckhoff Automation

Status
Twincat.hmi.server
Tf2000-hmi-server
Tf2000-hmi-server
Vendor
CVE Published:
20 January 2026

What is CVE-2025-41768?

An authenticated administrator on TwinCAT 3 HMI Server can exploit a flaw allowing them to inject arbitrary content into the custom CSS field. This injected content is saved and can later appear on the login and error pages, posing a potential security risk by deceiving users or exposing sensitive information.

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Deploy the Patch

Affected Version(s)

tf2000-hmi-server 0.0.0 < 14.4.267

TF2000-HMI-Server 0.0.0 < 14.4.267

TwinCAT.HMI.Server 0.0.0 < 14.4.267

References

https://certvde.com/de/advisories/VDE-2025-106

CVSS V3.1

Score:
5.5
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Roby Firnando Yusuf from Jeonbuk National University
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