CVE-2023-5222

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

CVSS 3.1 Medium 6.3

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

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.

Key data

CVSS 3.1 Medium 6.3

Score published by VulDB in the CVE record.

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

Attack vector: Adjacent
The attacker needs to be on the same shared network segment or a closely related one.
Attack complexity: Low
No special conditions are needed. The attack can be repeated at will.
Privileges required: None
No account or privileges are needed.
User interaction: None
No action from any user is needed.
Scope: Unchanged
The impact stays within the vulnerable component.
Confidentiality impact: Low
Limited effect on the secrecy of data.
Integrity impact: Low
Limited effect on the trustworthiness of data.
Availability impact: Low
Limited effect on availability.

Metric	Value	What it means
Attack vector	Adjacent	The attacker needs to be on the same shared network segment or a closely related one.
Attack complexity	Low	No special conditions are needed. The attack can be repeated at will.
Privileges required	None	No account or privileges are needed.
User interaction	None	No action from any user is needed.
Scope	Unchanged	The impact stays within the vulnerable component.
Confidentiality impact	Low	Limited effect on the secrecy of data.
Integrity impact	Low	Limited effect on the trustworthiness of data.
Availability impact	Low	Limited effect on availability.

CVSS 3.0 Medium 6.3

Score published by VulDB in the CVE record.

CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Attack vector: Adjacent
The attacker needs to be on the same shared network segment or a closely related one.
Attack complexity: Low
No special conditions are needed. The attack can be repeated at will.
Privileges required: None
No account or privileges are needed.
User interaction: None
No action from any user is needed.
Scope: Unchanged
The impact stays within the vulnerable component.
Confidentiality impact: Low
Limited effect on the secrecy of data.
Integrity impact: Low
Limited effect on the trustworthiness of data.
Availability impact: Low
Limited effect on availability.

Metric	Value	What it means
Attack vector	Adjacent	The attacker needs to be on the same shared network segment or a closely related one.
Attack complexity	Low	No special conditions are needed. The attack can be repeated at will.
Privileges required	None	No account or privileges are needed.
User interaction	None	No action from any user is needed.
Scope	Unchanged	The impact stays within the vulnerable component.
Confidentiality impact	Low	Limited effect on the secrecy of data.
Integrity impact	Low	Limited effect on the trustworthiness of data.
Availability impact	Low	Limited effect on availability.

CVSS 2.0 Medium 5.8

Score published by VulDB in the CVE record.

AV:A/AC:L/Au:N/C:P/I:P/A:P

Access vector: Adjacent network
The attacker needs to be on the same shared network segment.
Access complexity: Low
Specialized access conditions do not exist: the attack needs no special circumstances.
Authentication: None
No authentication is needed.
Confidentiality impact: Partial
Some data can be read.
Integrity impact: Partial
Some data can be changed.
Availability impact: Partial
Performance is reduced or some functions are interrupted.

Metric	Value	What it means
Access vector	Adjacent network	The attacker needs to be on the same shared network segment.
Access complexity	Low	Specialized access conditions do not exist: the attack needs no special circumstances.
Authentication	None	No authentication is needed.
Confidentiality impact	Partial	Some data can be read.
Integrity impact	Partial	Some data can be changed.
Availability impact	Partial	Performance is reduced or some functions are interrupted.

CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at first.org/cvss.

EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.

Score: 0.80402 (80.4% probability)
Percentile: 99.6%
Scores of: Nov 10, 2026
Model: v2026.06.15

CISA assessment as of Jul 9, 2024

Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA.

Exploitation: Public proof of concept recorded by CISA
Automatable: no
Technical impact: partial

Weakness (CWE)

CWE catalog version 5.0.

CWE-259Use of Hard-coded Password

Affected products

Products listed in the CVE record, as the CNA published them.

Viessmann Vitogate 300
- affected: 2.1.0
- affected: 2.1.1
- affected: 2.1.2
- affected: 2.1.3

References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

vuldb.com/?id.240364vdb-entrytechnical-description
vuldb.com/?ctiid.240364signaturepermissions-required
github.com/Push3AX/vul/blob/main/viessmann/Vitogate300_Hard…exploit

Timeline

ID reservedSep 27, 2023
Record publishedSep 27, 2023
Record last updatedAug 2, 2024

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Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:51 UTC. Sources and licenses