CVE-2025-39665

Published: Dec 3, 2025Modified: Jun 17, 2026

6.9

Vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XShow less

Source: security@checkmk.com (Secondary)

Description

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

Affected (1)

Products: Nagvis: Nagvis

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Nagvis Nagvis	Before 1.9.48

Related CWEs

Observable Discrepancy

The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor, which exposes security-relevant information about the state of the product, such as whether a particular operation was successful or not.

References (2)

https://github.com/NagVis/nagvis/pull/411/commits/4acabcf9d5b2d26f390e760f59def8e163908d66

Source: security@checkmk.com

Patch

https://www.nagvis.org/downloads/changelog/1.9.48

Source: security@checkmk.com

Release NotesVendor Advisory

Timeline

No history available yet.