{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"state":"PUBLISHED","cveId":"CVE-2021-22946","assignerOrgId":"36234546-b8fa-4601-9d6f-f4e334aa8ea1","assignerShortName":"hackerone","dateUpdated":"2026-04-16T13:53:47.481Z","dateReserved":"2021-01-06T00:00:00.000Z","datePublished":"2021-09-29T00:00:00.000Z"},"containers":{"cna":{"providerMetadata":{"orgId":"36234546-b8fa-4601-9d6f-f4e334aa8ea1","shortName":"hackerone","dateUpdated":"2022-12-19T00:00:00.000Z"},"descriptions":[{"lang":"en","value":"A user can tell curl >= 7.20.0 and <= 7.78.0 to require a successful upgrade to TLS when speaking to an IMAP, POP3 or FTP server (`--ssl-reqd` on the command line or`CURLOPT_USE_SSL` set to `CURLUSESSL_CONTROL` or `CURLUSESSL_ALL` withlibcurl). This requirement could be bypassed if the server would return a properly crafted but perfectly legitimate response.This flaw would then make curl silently continue its operations **withoutTLS** contrary to the instructions and expectations, exposing possibly sensitive data in clear text over the network."}],"affected":[{"vendor":"n/a","product":"https://github.com/curl/curl","versions":[{"version":"curl 7.20.0 to and including 7.78.0","status":"affected"}]}],"references":[{"url":"https://hackerone.com/reports/1334111"},{"name":"[debian-lts-announce] 20210930 [SECURITY] [DLA 2773-1] curl security 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