CVE-2023-42451

Published: Sep 19, 2023Modified: Jun 17, 2026

7.5

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Exploitability: 3.9 / Impact: 3.6

Source: NVD

Description

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.

Affected (7)

Products: Joinmastodon: Mastodon

Joinmastodon

1 product

Mastodon

Configuration A

7 vulnerable

Vulnerable Software	Affected Versions
Joinmastodon Mastodon	version < 3.5.14
Joinmastodon Mastodon	4.0.0 ≤ version < 4.0.10
Joinmastodon Mastodon	4.1.0 ≤ version < 4.1.8
Joinmastodon Mastodon	Version 4.2.0 beta1
Joinmastodon Mastodon	Version 4.2.0 beta2
Joinmastodon Mastodon	Version 4.2.0 beta3
Joinmastodon Mastodon	Version 4.2.0 rc1