Race condition in the XMPP library in Smack before 4.1.9, when the SecurityMode.required TLS setting has been set, allows man-in-the-middle attackers to bypass TLS protections and trigger use of cleartext for client authentication by stripping the "starttls" feature from a server response.
{ "github_reviewed": true, "nvd_published_at": "2017-01-12T23:59:00Z", "cwe_ids": [ "CWE-362" ], "github_reviewed_at": "2025-04-21T22:50:55Z", "severity": "MODERATE" }