CVE-2025-64998: Exposure of session signing secret in Checkmk <2.4.0p23, <2.3.0p45 and 2.2.0 allows an administrator of a remote site with config sync enabled to hijack…

PriorityP340high7.2CVSS 3.1

AVNACLPRHUINSUCHIHAH

EPSS

0.33%

25.3th percentile

Exposure of session signing secret in Checkmk <2.4.0p23, <2.3.0p45 and 2.2.0 allows an administrator of a remote site with config sync enabled to hijack sessions on the central site by forging session cookies.

Affected

6 ranges

Vendor	Product	Version range	Fixed in
checkmk	checkmk	—	—
checkmk	checkmk	—	—
checkmk	checkmk	—	—
checkmk_gmbh	checkmk	—	—
checkmk_gmbh	checkmk	>= 2.3.0 < 2.3.0p45	2.3.0p45
checkmk_gmbh	checkmk	>= 2.4.0 < 2.4.0p23	2.4.0p23

CVSS provenance

nvdv3.17.2HIGHCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

nvdv4.07.3HIGHCVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:H/VI:H/VA:H/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

osv7.3HIGH

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