CVE-2023-22339 Missing authorization in CONPROSYS HMI System (CHS)

High 7.5 Published 20 Jan 2023 Updated 3 Apr 2025

Remote unauthenticated attackers can bypass access controls to steal server certificates and private keys from CONPROSYS HMI systems.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2023-22339?

CVE-2023-22339 is a high-severity missing authorization vulnerability in Contec Co., Ltd. CONPROSYS HMI System (CHS), published on 20 Jan 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Improper access control vulnerability in CONPROSYS HMI System (CHS) Ver.3.4.5 and earlier allows a remote unauthenticated attacker to bypass access restriction and obtain the server certificate including the private key of the product.

Weakness: CWE-284

Which versions are affected by CVE-2023-22339?

It affects 1 product.

Products include Contec Conprosys Hmi System.

How do I fix CVE-2023-22339?

No fix has been published for CVE-2023-22339 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-2023-22339 being exploited?

There is no known exploitation of CVE-2023-22339 in the wild and no public exploit code.

Sources

Also known as GHSA-r659-h3gg-4vrp.