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Critical 9.8
Mellium allows Authentication Bypass by Spoofing
Mellium mellium.im/xmpp 0.0.1 through 0.21.4 allows response spoofing if the implementation uses predictable IDs because the stanza type is not checked. This is fixed in 0.22.0.
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Medium 5.9
Improper Validation of Certificate with Host Mismatch in mellium.im/xmpp/websocket
In Mellium mellium.im/xmpp through 0.21.0, an attacker capable of spoofing DNS TXT records can redirect a WebSocket connection request to a server under their control without causing TLS certificate verification to fail. This occurs because the wrong host nam…