Cached device information of remote users can be queried from Synapse. This can be used to enumerate the remote users known to a homeserver.
System administrators are encouraged to upgrade to Synapse 1.95.1 as soon as possible.
The federation_domain_whitelist
can be used to limit federation traffic with a homeserver.
{ "nvd_published_at": "2023-10-31T17:15:23Z", "cwe_ids": [ "CWE-200" ], "severity": "MODERATE", "github_reviewed": true, "github_reviewed_at": "2023-10-31T20:29:49Z" }