CVE-2025-65000

SSH private keys of the "Remote alert handlers (Linux)" rule were exposed in the rule page's HTML source in Checkmk <= 2.4.0p18 and all versions of Checkmk 2.3.0. This potentially allowed unauthorized triggering of predefined alert handlers on hosts where the handler was deployed.

VectorNETWORK

Published Bysecurity@checkmk.com

Published DateDec 18, 2025, 14:15

Weakness Type (CWE):CWE-212

CVSS Metrics

Base Score

2.3

Vector String

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:L/SA:L/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

Base Severity

LOW

Version

4.0

Attack Vector (AV)

NETWORK

Attack Complexity (AC)

LOW

Privileges Required (PR)

LOW

User Interaction (UI)

NONE

Scope (S)

Confidentiality (C)

Integrity (I)

Availability (A)

References

https://checkmk.com/werk/19030

Base Score

MEDIUM5.3

Weakness Type (CWE):CWE-212

CVSS Metrics

Base Score

2.3

Vector String

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:L/SA:L/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

Base Severity

LOW

Version

4.0

Attack Vector (AV)

NETWORK

Attack Complexity (AC)

LOW

Privileges Required (PR)

LOW

User Interaction (UI)

NONE

Scope (S)

Confidentiality (C)

Integrity (I)

Availability (A)