Mastodon is a free, open-source social network server based on ActivityPub. Prior to versions 3.5.14, 4.0.10, 4.1.8, and 4.2.0-rc2, under certain circumstances, attackers can exploit a flaw in domain name normalization to spoof domains they do not own. Versions 3.5.14, 4.0.10, 4.1.8, and 4.2.0-rc2 contain a patch for this issue.
{ "cpes": [ "cpe:2.3:a:joinmastodon:mastodon:*:*:*:*:*:*:*:*", "cpe:2.3:a:joinmastodon:mastodon:4.2.0:beta1:*:*:*:*:*:*", "cpe:2.3:a:joinmastodon:mastodon:4.2.0:beta2:*:*:*:*:*:*", "cpe:2.3:a:joinmastodon:mastodon:4.2.0:beta3:*:*:*:*:*:*", "cpe:2.3:a:joinmastodon:mastodon:4.2.0:rc1:*:*:*:*:*:*" ], "severity": "High" }