{"api_version":"1","generated_at":"2026-07-23T12:55:52+00:00","cve":"CVE-2021-37845","urls":{"html":"https://cve.report/CVE-2021-37845","api":"https://cve.report/api/cve/CVE-2021-37845.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2021-37845","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-37845"},"summary":{"title":"CVE-2021-37845","description":"An issue was discovered in Citadel through webcit-932. A meddler-in-the-middle attacker can fixate their own session during the cleartext phase before a STARTTLS command (a violation of \"The STARTTLS command is only valid in non-authenticated state.\" in RFC2595). This potentially allows an attacker to cause a victim's e-mail messages to be stored into an attacker's IMAP mailbox, but depends on details of the victim's client behavior.","state":"PUBLIC","assigner":"cve@mitre.org","published_at":"2023-05-29 19:15:00","updated_at":"2023-06-05 16:40:00"},"problem_types":["NVD-CWE-noinfo"],"metrics":[],"references":[{"url":"https://nostarttls.secvuln.info/","name":"https://nostarttls.secvuln.info/","refsource":"MISC","tags":[],"title":"NO STARTTLS","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://uncensored.citadel.org/dotgoto?room=Citadel%20Security","name":"http://uncensored.citadel.org/dotgoto?room=Citadel%20Security","refsource":"MISC","tags":[],"title":"Citadel Security - Uncensored","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://uncensored.citadel.org/msg/2099264259","name":"https://uncensored.citadel.org/msg/2099264259","refsource":"MISC","tags":[],"title":"","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-37845","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-37845","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2021","cve_id":"37845","vulnerable":"1","versionEndIncluding":"932","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"citadel","cpe5":"webcit","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-2021-37845","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 Citadel through webcit-932. A meddler-in-the-middle attacker can fixate their own session during the cleartext phase before a STARTTLS command (a violation of \"The STARTTLS command is only valid in non-authenticated state.\" in RFC2595). This potentially allows an attacker to cause a victim's e-mail messages to be stored into an attacker's IMAP mailbox, but depends on details of the victim's client behavior."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"n/a"}]}]},"references":{"reference_data":[{"url":"http://uncensored.citadel.org/dotgoto?room=Citadel%20Security","refsource":"MISC","name":"http://uncensored.citadel.org/dotgoto?room=Citadel%20Security"},{"url":"https://uncensored.citadel.org/msg/2099264259","refsource":"MISC","name":"https://uncensored.citadel.org/msg/2099264259"},{"refsource":"MISC","name":"https://nostarttls.secvuln.info/","url":"https://nostarttls.secvuln.info/"}]}},"nvd":{"publishedDate":"2023-05-29 19:15:00","lastModifiedDate":"2023-06-05 16:40:00","problem_types":["NVD-CWE-noinfo"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"NONE","availabilityImpact":"NONE","baseScore":3.7,"baseSeverity":"LOW"},"exploitabilityScore":2.2,"impactScore":1.4}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:citadel:webcit:*:*:*:*:*:*:*:*","versionEndIncluding":"932","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2021","CveId":"37845","Ordinal":"213442","Title":"CVE-2021-37845","CVE":"CVE-2021-37845","Year":"2021"},"notes":[{"CveYear":"2021","CveId":"37845","Ordinal":"1","NoteData":"** RESERVED ** This candidate has been reserved by an organization or individual that will use it when announcing a new security problem. When the candidate has been publicized, the details for this candidate will be provided.","Type":"Description","Title":null}]}}}