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CVE-2025-39665

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Date: December 3, 2025

User enumeration in Nagvis' Checkmk MultisiteAuth before version 1.9.48 allows an unauthenticated attacker to enumerate Checkmk usernames.

Severity Score

Related Resources (4)

https://nvd.nist.gov/vuln/detail/CVE-2025-39665
https://www.nagvis.org/downloads/changelog/1.9.48
https://github.com/NagVis/nagvis/pull/411/commits/4acabcf9d5b2d26f390e760f59def8e163908d66
https://www.mend.io/vulnerability-database/CVE-2025-39665

Severity Score

Weakness Type (CWE)

Observable Discrepancy

CWE-203

Top Fix

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Upgrade Version

Upgrade to version https://github.com/NagVis/nagvis.git - nagvis-1.9.48

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): LOW
Integrity (I): NONE
Availability (A): NONE

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