{"action":"Upgrade isync to 1.3.0-2.1 or later.","affected":[{"fixed":"1.3.0-2.1","introduced":"0"}],"component":"isync","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["1.3.0-2.1"],"id":"tcs_01M5NFB4CPXF60QVZHJKWBNP8G","modified_at":"2026-10-23T18:03:10.497507326Z","published_at":"2021-02-23T19:15:13.510Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2021-20247","https://security-tracker.debian.org/tracker/CVE-2021-20247"],"severity":{"label":"high","score":7.4},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2021-20247#Debian:13/isync","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2021-20247"}],"summary":"A flaw was found in mbsync before v1.3.5 and v1.4.1. Validations of the mailbox names returned by IMAP LIST/LSUB do not occur allowing a malicious or compromised server to use specially crafted mailbo"}