CVE-2025-64998
Session hijacking via exposed session signing secret in distributed Checkmk setups
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
10th
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.
| CWE | CWE-522 |
| Vendor | checkmk gmbh |
| Product | checkmk |
| Published | Mar 24, 2026 |
| Last Updated | Mar 25, 2026 |
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Affected Versions
Checkmk GmbH / Checkmk
2.4.0 < 2.4.0p23 2.3.0 < 2.3.0p45 2.2.0
Credits
🔍 Lisa Gnedt (SBA Research)