CVE-2023-5702Public exploit

Unauthenticated configuration disclosure via forced browsing

Published Oct 23, 2023 · Updated Aug 2, 2024

Forced browsing in Viessmann Vitogate 300 2.1.3.0 and earlier allows remote attackers to read sensitive configuration data. The integrated web server does not enforce authentication on resources under /cgi-bin/, so direct directory requests expose configuration files containing server and account credentials. No login is required, but the attacker must reach the appliance from an adjacent network; the reported consequence is disclosure rather than modification or interruption.

CVSS severity7.1
High
EPSS probability14.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Forced browsing in Viessmann Vitogate 300 2.1.3.0 and earlier allows remote attackers to read sensitive configuration data. The integrated web server does not enforce authentication on resources under /cgi-bin/, so direct directory requests expose configuration files containing server and account credentials. No login is required, but the attacker must reach the appliance from an adjacent network; the reported consequence is disclosure rather than modification or interruption.

The record

CVE
CVE-2023-5702
Published
Oct 23, 2023
Updated
Aug 2, 2024
Vendor
Viessmann
Product
Vitogate 300
Classifications
CWE-425, CAPEC-87, T0866
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 23, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.1.0
  2. Affected versionversion=2.1.1
  3. Affected versionversion=2.1.2
  4. Affected versionversion=2.1.3

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Viessmann · Vitogate 300version=2.1.0; version=2.1.1; version=2.1.2; version=2.1.3

Published CVSS scores

7.1Carrier PSIRTCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
4.3VulDBCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
3.3VulDBAV:A/AC:L/Au:N/C:P/I:N/A:N
6.5NIST NVDCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-425Direct Request ('Forced Browsing')
CAPEC-87Forceful Browsing
T0866Exploitation of Remote Services

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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