CVE-2023-3663 CODESYS: Missing integrity check in CODESYS Development System

High 8.8 Published 3 Aug 2023 Updated 27 Feb 2025

An unauthenticated remote attacker can manipulate HTTP notification content in CODESYS Development System due to missing integrity checks.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2023-3663?

CVE-2023-3663 is a high-severity missing authorization vulnerability in CODESYS Development System, published on 3 Aug 2023. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

In CODESYS Development System versions from 3.5.11.20 and before 3.5.19.20 a missing integrity check might allow an unauthenticated remote attacker to manipulate the content of notifications received via HTTP by the CODESYS notification server.

Weakness: CWE-940

Which versions are affected by CVE-2023-3663?

It affects 1 product.

Products include Codesys Development System.

How do I fix CVE-2023-3663?

No fix has been published for CVE-2023-3663 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2023-3663 being exploited?

There is no known exploitation of CVE-2023-3663 in the wild and no public exploit code.

Sources

Also known as GHSA-c86m-wfx2-qmx9.