CVE-2023-5222

Name: CVE-2023-5222
Creator: NVD / NIST
Published: 2023-09-27T15:19:43.387+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 74.70%

Last modified Jun 17, 2026

CVE-2023-5222 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. A vulnerability classified as critical was found in Viessmann Vitogate 300 up to 2.1.3.0. This vulnerability affects the function isValidUser of the file /cgi-bin/vitogate.cgi of the component Web Management Interface. EPSS estimates a 74.70% chance of exploitation in the next 30 days.

Description

A vulnerability classified as critical was found in Viessmann Vitogate 300 up to 2.1.3.0. This vulnerability affects the function isValidUser of the file /cgi-bin/vitogate.cgi of the component Web Management Interface. The manipulation leads to use of hard-coded password. The exploit has been disclosed to the public and may be used. The identifier of this vulnerability is VDB-240364. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

74.70%

99.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-259

Affected Software

Vendor	Product	Versions
Viessmann	Vitogate 300 Firmware	<= 2.1.3.0

References

https://github.com/Push3AX/vul/blob/main/viessmann/Vitogate300_HardcodedPassword.mdExploit, Third Party Advisory
https://vuldb.com/?ctiid.240364Permissions Required, Third Party Advisory, VDB Entry
https://vuldb.com/?id.240364Permissions Required, Third Party Advisory, VDB Entry
https://github.com/Push3AX/vul/blob/main/viessmann/Vitogate300_HardcodedPassword.mdExploit, Third Party Advisory
https://vuldb.com/?ctiid.240364Permissions Required, Third Party Advisory, VDB Entry
https://vuldb.com/?id.240364Permissions Required, Third Party Advisory, VDB Entry

Timeline

Published: Sep 27, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-5222?

How severe is CVE-2023-5222?

CVE-2023-5222 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 74.70% probability of exploitation in the next 30 days.

How do I fix CVE-2023-5222?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-5222?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST