CVE-2023-42451
Mastodon Invalid Domain Name Normalization vulnerability
7.5
HIGH
CVSS 3.1
EPSS 0.31%
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, 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 contain a patch for this issue.
How to fix CVE-2023-42451
To remediate CVE-2023-42451, upgrade the affected package to a fixed version below.
- —upgrade to 3.5.14 or later
Is CVE-2023-42451 being exploited?
Low — EPSS is 0.3%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 3.5.14, >= 4.0.0, < 4.0.10, >= 4.1.0, < 4.1.8
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |