The web management console of CheckMK Raw Edition (versions 1.5.0 to 1.6.0) allows a…
Priority MEDIUM 44CWE-276Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
The web management console of CheckMK Raw Edition (versions 1.5.0 to 1.6.0) allows a misconfiguration of the web-app Dokuwiki (installed by default), which allows embedded php code. As a result, remote code execution is achieved. Successful exploitation requires access to the web management interface, either with valid credentials or with a hijacked session by a user with the role of administrator.
Why it matters now
EPSS 0.03692 89th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:* | 1.5.0 to before 1.6.0 | Vulnerable | Checkmk GmbH |
- cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:* Versions 1.5.0 to before 1.6.0 Vulnerable ·Checkmk GmbH
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-40904
- 2026-10-03 Alias added: GHSA-f6hf-q5rw-f57w
References
More Checkmk GmbH Checkmk vulnerabilities
- TI-2025-26345 Cross Site Scripting through compromised remote site CVSS 4.0HIGH 8.5
- TI-2025-40190 Cross-site scripting in HTML logs of Synthetic Monitoring test services CVSS 4.0HIGH 7.3
- TI-2024-19037 Brute-force protection ineffective for some login methods CVSS 3.1CRITICAL 9.8
- TI-2024-05712 local IP restriction of internal HTTP endpoints CVSS 3.1CRITICAL 9.8
- TI-2021-17818 The web management console of CheckMK Enterprise Edition (versions 1.5.0 to 2.0.0p9) does… CVSS 3.1HIGH 8.8
- TI-2024-07982 Fix 2FA bypass via RestAPI CVSS 4.0CRITICAL 9.2
Sources
- CVE-2021-40904 · CVE Program
- CVE-2021-40904 · NVD
- FIRST EPSS
- GHSA-f6hf-q5rw-f57w · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences