Read the docs
TI-2023-04802 Aliases CVE-2023-5222GHSA-cm4f-g738-hp2g

Viessmann Vitogate 300 Web Management Interface vitogate.cgi isValidUser hard-coded password

Priority HIGH 82CWE-259Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-259.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.80402 99th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA and NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ViessmannVitogate 3002.1.0; 2.1.1; 2.1.2; 2.1.3—No fix listedCNA
  • Vitogate 300 VendorViessmann Affected 2.1.0; 2.1.1; 2.1.2; 2.1.3 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:viessmann:vitogate_300_firmware:*:*:*:*:*:*:*:*up to 2.1.3.0VulnerableViessmann
cpe:2.3:h:viessmann:vitogate_300:-:*:*:*:*:*:*:*not specified by NVDRunning onViessmann
  • cpe:2.3:o:viessmann:vitogate_300_firmware:*:*:*:*:*:*:*:* Versions up to 2.1.3.0 Vulnerable ·Viessmann
  • cpe:2.3:h:viessmann:vitogate_300:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Viessmann

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-5222
  2. 2026-10-03 Alias added: GHSA-cm4f-g738-hp2g

References

Exploit 1

  • TI-2023-24609 In Vitogate 300 2.1.3.0, /cgi-bin/vitogate.cgi allows an unauthenticated attacker to… CVSS 3.1CRITICAL 9.8
  • TI-2023-05245 Viessmann Vitogate 300 direct request CVSS 3.1MEDIUM 6.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences