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Fencer Vulns
medium 6.3

CVE-2023-5222 json

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

published 2023-09-27 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-57551

cvss
6.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
80.4%
EPSS 80.4% chance of exploitation in 30 days, percentile 99.6%
public exploits
1
Exploit-DB, plus a Nuclei check

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.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-24-254-01 updated cvss 9.8

Viessmann Climate Solutions SE Vitogate 300

  • Viessmann Climate Solutions SE Viessmann Vitogate 300 <=2.1.3.0
    affected: mitigation “Viessmann Climate Solutions SE recommends customers update to version 3.0.0.0 to fix these vulnerabilities. The software is available to download at their (website)” connectivity.viessmann.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Timeline

  1. Published
  2. First public exploit (EDB-51887)

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

80.40% chance of exploitation in the next 30 days, higher than 99.6% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-51887 Viessmann Vitogate 300 2.1.3.0 - Remote Code Execution (RCE) remote, 2024-03-14
  • Nuclei template Viessmann Vitogate 300 - Hardcoded Password nuclei detection template
  • github.com https://github.com/Push3AX/vul/blob/main/viessmann/Vitogate300_HardcodedPassword.md referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 6.3 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
CNA 3.0 6.3 CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
CNA 2.0 5.8 AV:A/AC:L/Au:N/C:P/I:P/A:P
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Viessmann Vitogate 300

Classification

Weakness
  • CWE-259 Use of Hard-coded Password

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.