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",
"github_reviewed": true,
"github_reviewed_at": "2019-08-12T15:06:23Z",
"severity": "CRITICAL",
"cwe_ids": [
"CWE-295"
]
}