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.
{ "nvd_published_at": "2019-06-16T12:29:00Z", "cwe_ids": [ "CWE-295" ], "severity": "CRITICAL", "github_reviewed": true, "github_reviewed_at": "2019-08-12T15:06:23Z" }