{"containers": {"cna": {"affected": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "descriptions": [{"lang": "en", "value": "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."}], "problemTypes": [{"descriptions": [{"description": "n/a", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2026-07-05T13:35:29.693Z", "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre"}, "references": [{"url": "https://github.com/Edgarloyola/CVE-2021-40905"}, {"url": "https://docs.checkmk.com/latest/en/mkps.html"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "cve@mitre.org", "ID": "CVE-2021-40905", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "n/a", "version": {"version_data": [{"version_value": "n/a"}]}}]}, "vendor_name": "n/a"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "** DISPUTED ** 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."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "n/a"}]}]}, "references": {"reference_data": [{"name": "http://checkmk.com", "refsource": "MISC", "url": "http://checkmk.com"}, {"name": "https://github.com/Edgarloyola/CVE-2021-40905", "refsource": "MISC", "url": "https://github.com/Edgarloyola/CVE-2021-40905"}]}}, "tags": ["disputed"]}, "adp": [{"problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-434", "lang": "en", "description": "CWE-434 Unrestricted Upload of File with Dangerous Type"}]}], "affected": [{"vendor": "tribe29", "product": "checkmk", "cpes": ["cpe:2.3:a:tribe29:checkmk:*:*:*:*:*:*:*:*"], "defaultStatus": "unknown", "versions": [{"version": "1.5.0", "status": "affected", "lessThan": "2.0.0p9", "versionType": "custom"}]}], "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2024-07-18T14:50:40.204134Z", "id": "CVE-2021-40905", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-07-18T15:09:41.491Z"}}, {"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-07-09T00:14:49.009Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/Edgarloyola/CVE-2021-40905"}]}]}, "cveMetadata": {"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "cveId": "CVE-2021-40905", "datePublished": "2022-03-25T22:20:01.000Z", "dateReserved": "2021-09-13T00:00:00.000Z", "dateUpdated": "2026-07-09T00:14:49.009Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.2"}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "https://github.com/Edgarloyola/CVE-2021-40905", "tags": ["x_refsource_MISC", "x_transferred"]}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-07-09T00:14:49.009Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2021-40905", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2024-07-18T14:50:40.204134Z"}}}], "affected": [{"cpes": ["cpe:2.3:a:tribe29:checkmk:*:*:*:*:*:*:*:*"], "vendor": "tribe29", "product": "checkmk", "versions": [{"status": "affected", "version": "1.5.0", "lessThan": "2.0.0p9", "versionType": "custom"}], "defaultStatus": "unknown"}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-434", "description": "CWE-434 Unrestricted Upload of File with Dangerous Type"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-07-18T15:09:32.815Z"}}], "cna": {"tags": ["disputed"], "affected": [{"vendor": "n/a", "product": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "references": [{"url": "https://github.com/Edgarloyola/CVE-2021-40905"}, {"url": "https://docs.checkmk.com/latest/en/mkps.html"}], "descriptions": [{"lang": "en", "value": "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."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "text", "description": "n/a"}]}], "providerMetadata": {"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2026-07-05T13:35:29.693Z"}, "x_legacyV4Record": {"affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"version": {"version_data": [{"version_value": "n/a"}]}, "product_name": "n/a"}]}, "vendor_name": "n/a"}]}}, "data_type": "CVE", "references": {"reference_data": [{"url": "http://checkmk.com", "name": "http://checkmk.com", "refsource": "MISC"}, {"url": "https://github.com/Edgarloyola/CVE-2021-40905", "name": "https://github.com/Edgarloyola/CVE-2021-40905", "refsource": "MISC"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "eng", "value": "** DISPUTED ** 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."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "n/a"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2021-40905", "STATE": "PUBLIC", "ASSIGNER": "cve@mitre.org"}}}}, "cveMetadata": {"cveId": "CVE-2021-40905", "state": "PUBLISHED", "dateUpdated": "2026-07-09T00:14:49.009Z", "dateReserved": "2021-09-13T00:00:00.000Z", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "datePublished": "2022-03-25T22:20:01.000Z", "assignerShortName": "mitre"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}, {"affectedData": [{"cpes": ["cpe:2.3:a:tribe29:checkmk:*:*:*:*:*:*:*:*"], "defaultStatus": "unknown", "product": "checkmk", "vendor": "tribe29", "versions": [{"lessThan": "2.0.0p9", "status": "affected", "version": "1.5.0", "versionType": "custom"}]}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:checkmk:checkmk:2.0.0:-:*:*:*:*:*:*", "matchCriteriaId": "F8EDFDCA-0778-4540-B1D5-D3A986258028", "vulnerable": true}, {"criteria": "cpe:2.3:a:checkmk:checkmk:2.0.0:b1:*:*:*:*:*:*", "matchCriteriaId": "54031390-D7E7-4A14-AA2F-923768B3685F", "vulnerable": true}, {"criteria": "cpe:2.3:a:checkmk:checkmk:2.0.0:b2:*:*:*:*:*:*", "matchCriteriaId": "F1B7E35F-5A07-424E-AA09-AC54104D612B", "vulnerable": true}, {"criteria": "cpe:2.3:a:checkmk:checkmk:2.0.0:b3:*:*:*:*:*:*", "matchCriteriaId": "8D4AC302-C8F5-4A2B-A73A-982D0AA2495A", "vulnerable": true}, {"criteria": "cpe:2.3:a:checkmk:checkmk:2.0.0:b4:*:*:*:*:*:*", "matchCriteriaId": "7A058C71-C39E-4109-B570-4A061013D033", "vulnerable": true}, {"criteria": "cpe:2.3:a:checkmk:checkmk:2.0.0:b5:*:*:*:*:*:*", "matchCriteriaId": "22BCFA79-B3D6-4FFF-A3D3-8C4C97AF17C5", "vulnerable": true}, {"criteria": "cpe:2.3:a:checkmk:checkmk:2.0.0:b6:*:*:*:*:*:*", "matchCriteriaId": "2A1703D9-8EEB-432D-90E2-F847CDC4C204", "vulnerable": true}, {"criteria": "cpe:2.3:a:checkmk:checkmk:2.0.0:b7:*:*:*:*:*:*", "matchCriteriaId": "1A4C72BA-6D78-4911-83E4-4DABB2CAC47F", "vulnerable": true}, {"criteria": "cpe:2.3:a:checkmk:checkmk:2.0.0:b8:*:*:*:*:*:*", "matchCriteriaId": "081FD127-1066-4019-B521-9FADB85DBD4A", "vulnerable": true}, {"criteria": "cpe:2.3:a:checkmk:checkmk:2.0.0:i1:*:*:*:*:*:*", "matchCriteriaId": "C1A4F005-4823-4B2B-B4EF-4EFDB04CFB9B", "vulnerable": true}, {"criteria": "cpe:2.3:a:checkmk:checkmk:2.0.0:p1:*:*:*:*:*:*", "matchCriteriaId": "357240B1-F0DA-4FA8-B782-D998951F4B54", "vulnerable": true}, {"criteria": "cpe:2.3:a:checkmk:checkmk:2.0.0:p10:*:*:*:*:*:*", "matchCriteriaId": "2F828F54-04E2-4B98-91A7-B09ED833E88B", "vulnerable": true}, {"criteria": "cpe:2.3:a:checkmk:checkmk:2.0.0:p11:*:*:*:*:*:*", "matchCriteriaId": "A4B8B300-8264-40AB-A839-7EACB988163B", "vulnerable": true}, {"criteria": "cpe:2.3:a:checkmk:checkmk:2.0.0:p12:*:*:*:*:*:*", "matchCriteriaId": "EB76A8DF-C870-482F-A488-DB2917ABD971", "vulnerable": true}, {"criteria": "cpe:2.3:a:checkmk:checkmk:2.0.0:p13:*:*:*:*:*:*", "matchCriteriaId": "04947B1B-CF67-4C11-8FE3-6C17FD35E2EF", "vulnerable": true}, {"criteria": "cpe:2.3:a:checkmk:checkmk:2.0.0:p14:*:*:*:*:*:*", "matchCriteriaId": "591AEC3C-2F48-4E91-9881-42EEDD039C5D", "vulnerable": true}, {"criteria": "cpe:2.3:a:checkmk:checkmk:2.0.0:p15:*:*:*:*:*:*", "matchCriteriaId": "C5CA04C8-2C80-4C7E-B329-3FFCBEDEE663", "vulnerable": true}, {"criteria": "cpe:2.3:a:checkmk:checkmk:2.0.0:p16:*:*:*:*:*:*", "matchCriteriaId": "47A1C5AC-C8B7-495A-A5F4-CD4790358A2E", "vulnerable": true}, {"criteria": "cpe:2.3:a:checkmk:checkmk:2.0.0:p17:*:*:*:*:*:*", "matchCriteriaId": "B87D8B46-5B04-460D-BBA1-BB19234DA19D", "vulnerable": true}, {"criteria": "cpe:2.3:a:checkmk:checkmk:2.0.0:p2:*:*:*:*:*:*", "matchCriteriaId": "F1E5549E-3272-478D-85D0-6F53EE731183", "vulnerable": true}, {"criteria": "cpe:2.3:a:checkmk:checkmk:2.0.0:p3:*:*:*:*:*:*", "matchCriteriaId": "D884D3AF-7D57-4DF6-82E8-556C35319ED2", "vulnerable": true}, {"criteria": "cpe:2.3:a:checkmk:checkmk:2.0.0:p4:*:*:*:*:*:*", "matchCriteriaId": "528BAFA3-ED39-45B5-8C81-A6FD76DDB49B", "vulnerable": true}, {"criteria": "cpe:2.3:a:checkmk:checkmk:2.0.0:p5:*:*:*:*:*:*", "matchCriteriaId": "02DA7C50-7360-4679-93A5-92C8DC5E8E46", "vulnerable": true}, {"criteria": "cpe:2.3:a:checkmk:checkmk:2.0.0:p6:*:*:*:*:*:*", "matchCriteriaId": "71B49D90-9522-46C6-8948-B9C21CEA473C", "vulnerable": true}, {"criteria": "cpe:2.3:a:checkmk:checkmk:2.0.0:p7:*:*:*:*:*:*", "matchCriteriaId": "98C29296-D1F3-45A2-BF0A-22333150F416", "vulnerable": true}, {"criteria": "cpe:2.3:a:checkmk:checkmk:2.0.0:p8:*:*:*:*:*:*", "matchCriteriaId": "339226E6-532F-4FE2-A543-6B166A9BA7F3", "vulnerable": true}, {"criteria": "cpe:2.3:a:checkmk:checkmk:2.0.0:p9:*:*:*:*:*:*", "matchCriteriaId": "986FDFA6-BE12-4268-9B90-F7D469BBE517", "vulnerable": true}, {"criteria": "cpe:2.3:a:tribe29:checkmk:*:*:*:*:*:*:*:*", "matchCriteriaId": "564469A7-7D79-40BF-9177-2D95D502AD2F", "versionEndExcluding": "2.0.0", "versionStartIncluding": "1.5.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [{"sourceIdentifier": "cve@mitre.org", "tags": ["disputed"]}], "descriptions": [{"lang": "en", "value": "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"}, {"lang": "es", "value": "** EN DISTPUTA ** La consola de administraci\u00f3n web de CheckMK Enterprise Edition (versiones 1.5.0 a 2.0.0p9) no sanea correctamente la carga de archivos \".mkp\", que son Paquetes de Extensi\u00f3n, haciendo posible una ejecuci\u00f3n de c\u00f3digo remota. Una explotaci\u00f3n con \u00e9xito requiere el acceso a la interfaz de administraci\u00f3n web, ya sea con credenciales v\u00e1lidas o con una sesi\u00f3n secuestrada de un usuario con rol de administrador. NOTA: el proveedor afirma que este es el comportamiento previsto: se supone que los administradores pueden ejecutar c\u00f3digo de esta manera"}], "id": "CVE-2021-40905", "lastModified": "2026-06-17T04:07:37.637", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 6.8, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 6.4, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": true}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2021-40905", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2024-07-18T14:50:40.204134Z", "version": "2.0.3"}}]}, "published": "2022-03-25T23:15:08.237", "references": [{"source": "cve@mitre.org", "tags": ["Product"], "url": "http://checkmk.com"}, {"source": "cve@mitre.org", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/Edgarloyola/CVE-2021-40905"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Product"], "url": "http://checkmk.com"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/Edgarloyola/CVE-2021-40905"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-434"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-434"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{}

{}