{"action":"Upgrade thunderbird to 1:91.2.1-1 or later.","affected":[{"fixed":"1:91.2.1-1","introduced":"0"}],"component":"thunderbird","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":["1:91.2.1-1"],"id":"tcs_01M5NFX1ZA63CXMW5FZZ8JR8D8","modified_at":"2026-10-23T18:03:31.878851622Z","published_at":"2021-11-03T01:15:07.657Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2021-38502","https://security-tracker.debian.org/tracker/CVE-2021-38502"],"severity":{"label":"medium","score":5.9},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2021-38502","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2021-38502"}],"summary":"Thunderbird ignored the configuration to require STARTTLS security for an SMTP connection. A MITM could perform a downgrade attack to intercept transmitted messages, or could take control of the authe"}