CVE-2021-40905
Summary
| CVE | CVE-2021-40905 |
|---|---|
| State | PUBLISHED |
| Assigner | mitre |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2022-03-25 23:15:08 UTC |
| Updated | 2026-07-09 01:17:02 UTC |
| Description | The web management console of CheckMK Enterprise Edition (versions 1.5.0 to 2.0.0p9) does not properly sanitise the uploading of ".mkp" files, which are Extension Packages, making remote code execution possible. Successful exploitation requires access to the web management interface, either with valid credentials or with a hijacked session of a user with administrator role. NOTE: the vendor states that this is the intended behavior: admins are supposed to be able to execute code in this manner. |
Risk And Classification
Primary CVSS: v3.1 8.8 HIGH from [email protected]
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS: 0.028120000 probability, percentile 0.848660000 (date 2026-07-12)
Problem Types: CWE-434 | n/a | CWE-434 CWE-434 Unrestricted Upload of File with Dangerous Type
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Primary | 8.8 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| 3.1 | ADP | DECLARED | 8.8 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| 3.1 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | Secondary | 8.8 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| 2.0 | [email protected] | Primary | 6.8 | AV:N/AC:M/Au:N/C:P/I:P/A:P |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
RequiredScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v2.0 Breakdown
Access Vector
NetworkAccess Complexity
MediumAuthentication
NoneConfidentiality
PartialIntegrity
PartialAvailability
PartialAV:N/AC:M/Au:N/C:P/I:P/A:P
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Application | Checkmk | Checkmk | 2.0.0 | - | All | All |
| Application | Checkmk | Checkmk | 2.0.0 | b1 | All | All |
| Application | Checkmk | Checkmk | 2.0.0 | b2 | All | All |
| Application | Checkmk | Checkmk | 2.0.0 | b3 | All | All |
| Application | Checkmk | Checkmk | 2.0.0 | b4 | All | All |
| Application | Checkmk | Checkmk | 2.0.0 | b5 | All | All |
| Application | Checkmk | Checkmk | 2.0.0 | b6 | All | All |
| Application | Checkmk | Checkmk | 2.0.0 | b7 | All | All |
| Application | Checkmk | Checkmk | 2.0.0 | b8 | All | All |
| Application | Checkmk | Checkmk | 2.0.0 | i1 | All | All |
| Application | Checkmk | Checkmk | 2.0.0 | p1 | All | All |
| Application | Checkmk | Checkmk | 2.0.0 | p10 | All | All |
| Application | Checkmk | Checkmk | 2.0.0 | p11 | All | All |
| Application | Checkmk | Checkmk | 2.0.0 | p12 | All | All |
| Application | Checkmk | Checkmk | 2.0.0 | p13 | All | All |
| Application | Checkmk | Checkmk | 2.0.0 | p14 | All | All |
| Application | Checkmk | Checkmk | 2.0.0 | p15 | All | All |
| Application | Checkmk | Checkmk | 2.0.0 | p16 | All | All |
| Application | Checkmk | Checkmk | 2.0.0 | p17 | All | All |
| Application | Checkmk | Checkmk | 2.0.0 | p2 | All | All |
| Application | Checkmk | Checkmk | 2.0.0 | p3 | All | All |
| Application | Checkmk | Checkmk | 2.0.0 | p4 | All | All |
| Application | Checkmk | Checkmk | 2.0.0 | p5 | All | All |
| Application | Checkmk | Checkmk | 2.0.0 | p6 | All | All |
| Application | Checkmk | Checkmk | 2.0.0 | p7 | All | All |
| Application | Checkmk | Checkmk | 2.0.0 | p8 | All | All |
| Application | Checkmk | Checkmk | 2.0.0 | p9 | All | All |
| Application | Tribe29 | Checkmk | All | All | All | All |
Vendor Declared Affected Products
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| docs.checkmk.com/latest/en/mkps.html | [email protected] | docs.checkmk.com | |
| GitHub - Edgarloyola/CVE-2021-40905 | af854a3a-2127-422b-91ae-364da2661108 | github.com | Exploit, Third Party Advisory |
| Infrastructure & Application Monitoring with Checkmk | MITRE | checkmk.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.