{"action":"Upgrade twisted to 18.9.0-7 or later.","affected":[{"fixed":"18.9.0-7","introduced":"0"}],"component":"twisted","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":["18.9.0-7"],"id":"tcs_01M5NDRRXD7SPR133AW9J9MKW4","modified_at":"2026-09-21T07:00:57.286578387Z","published_at":"2019-06-16T12:29:00.227Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2019-12855","https://security-tracker.debian.org/tracker/CVE-2019-12855"],"severity":{"label":"high","score":7.4},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2019-12855","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2019-12855"}],"summary":"In words.protocols.jabber.xmlstream in Twisted through 19.2.1, XMPP support did not verify certificates when used with TLS, allowing an attacker to MITM connections."}