{"api_version":"1","generated_at":"2026-04-23T04:08:50+00:00","cve":"CVE-2020-27155","urls":{"html":"https://cve.report/CVE-2020-27155","api":"https://cve.report/api/cve/CVE-2020-27155.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2020-27155","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-27155"},"summary":{"title":"CVE-2020-27155","description":"An issue was discovered in Octopus Deploy through 2020.4.4. If enabled, the websocket endpoint may allow an untrusted tentacle host to present itself as a trusted one.","state":"PUBLIC","assigner":"cve@mitre.org","published_at":"2020-10-22 17:15:00","updated_at":"2020-10-30 14:08:00"},"problem_types":["NVD-CWE-noinfo"],"metrics":[],"references":[{"url":"https://github.com/OctopusDeploy/Issues/issues/6637","name":"https://github.com/OctopusDeploy/Issues/issues/6637","refsource":"MISC","tags":["Issue Tracking","Third Party Advisory"],"title":"WebSocket polling endpoint can allow untrusted connections · Issue #6637 · OctopusDeploy/Issues · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://github.com/OctopusDeploy","name":"https://github.com/OctopusDeploy","refsource":"MISC","tags":["Third Party Advisory"],"title":"Octopus Deploy · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://github.com/OctopusDeploy/Issues/issues/6640","name":"https://github.com/OctopusDeploy/Issues/issues/6640","refsource":"MISC","tags":["Issue Tracking","Patch","Third Party Advisory"],"title":"WebSocket polling endpoint can allow untrusted connections · Issue #6640 · OctopusDeploy/Issues · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://github.com/OctopusDeploy/Issues/issues/6639","name":"https://github.com/OctopusDeploy/Issues/issues/6639","refsource":"MISC","tags":["Issue Tracking","Patch","Third Party Advisory"],"title":"WebSocket polling endpoint can allow untrusted connections · Issue #6639 · OctopusDeploy/Issues · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-27155","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-27155","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2020","cve_id":"27155","vulnerable":"1","versionEndIncluding":"2020.4.4","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"octopus","cpe5":"octopus_deploy","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"CVE_data_meta":{"ASSIGNER":"cve@mitre.org","ID":"CVE-2020-27155","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":"An issue was discovered in Octopus Deploy through 2020.4.4. If enabled, the websocket endpoint may allow an untrusted tentacle host to present itself as a trusted one."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"n/a"}]}]},"references":{"reference_data":[{"url":"https://github.com/OctopusDeploy","refsource":"MISC","name":"https://github.com/OctopusDeploy"},{"refsource":"MISC","name":"https://github.com/OctopusDeploy/Issues/issues/6637","url":"https://github.com/OctopusDeploy/Issues/issues/6637"},{"refsource":"MISC","name":"https://github.com/OctopusDeploy/Issues/issues/6639","url":"https://github.com/OctopusDeploy/Issues/issues/6639"},{"refsource":"MISC","name":"https://github.com/OctopusDeploy/Issues/issues/6640","url":"https://github.com/OctopusDeploy/Issues/issues/6640"}]}},"nvd":{"publishedDate":"2020-10-22 17:15:00","lastModifiedDate":"2020-10-30 14:08:00","problem_types":["NVD-CWE-noinfo"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"HIGH","availabilityImpact":"NONE","baseScore":7.5,"baseSeverity":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:N/AC:M/Au:N/C:N/I:P/A:N","accessVector":"NETWORK","accessComplexity":"MEDIUM","authentication":"NONE","confidentialityImpact":"NONE","integrityImpact":"PARTIAL","availabilityImpact":"NONE","baseScore":4.3},"severity":"MEDIUM","exploitabilityScore":8.6,"impactScore":2.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:octopus:octopus_deploy:*:*:*:*:*:*:*:*","versionStartIncluding":"3.11.13","versionEndIncluding":"2020.4.4","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2020","CveId":"27155","Ordinal":"188589","Title":"CVE-2020-27155","CVE":"CVE-2020-27155","Year":"2020"},"notes":[{"CveYear":"2020","CveId":"27155","Ordinal":"1","NoteData":"An issue was discovered in Octopus Deploy through 2020.4.4. If enabled, the websocket endpoint may allow an untrusted tentacle host to present itself as a trusted one.","Type":"Description","Title":null},{"CveYear":"2020","CveId":"27155","Ordinal":"2","NoteData":"2020-10-22","Type":"Other","Title":"Published"},{"CveYear":"2020","CveId":"27155","Ordinal":"3","NoteData":"2020-10-22","Type":"Other","Title":"Modified"}]}}}