UpHeron
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Servers and applications

CVE-2023-42451

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.

Severity
High 7.5
Published
19 Sept 2023
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
3.5.14, 4.0.10, 4.1.8
Sources
NVD

Affected software

SoftwareAffected versions
MastodonServers and applications · cpe:a:joinmastodon:mastodon
  • Version 4.2.0-rc1
  • Version 4.2.0-beta3
  • Version 4.2.0-beta2
  • Version 4.2.0-beta1
All 7 release lines
  • Every version before 3.5.14
  • From 4.0.0 before 4.0.10
  • From 4.1.0 before 4.1.8
  • Version 4.2.0-beta1
  • Version 4.2.0-beta2
  • Version 4.2.0-beta3
  • Version 4.2.0-rc1

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2023-42451
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2023-42451