UpHeron
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Servers and applications

CVE-2023-36462

Verified profile links can be formatted in a misleading way

Severity
Medium 5.4
Published
6 Jul 2023
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
3.5.9, 4.0.5, 4.1.3
Also known as
GHSA-55j9-c3mp-6fcq
Sources
NVD, Project advisories (GitHub)

Description

Mastodon is a free, open-source social network server based on ActivityPub. Starting in version 2.6.0 and prior to versions 3.5.9, 4.0.5, and 4.1.3, an attacker can craft a verified profile link using specific formatting to conceal arbitrary parts of the link, enabling it to appear to link to a different URL altogether. The link is visually misleading, but clicking on it will reveal the actual…

Affected software

SoftwareAffected versions
MastodonServers and applications · cpe:a:joinmastodon:mastodon
  • From 2.6.0 before 3.5.9
  • From 4.0.0 before 4.0.5
  • From 4.1.0 before 4.1.3
MastodonServers and applications · github:mastodon/mastodon
  • From 2.6.0 before 3.5.9

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2023-36462
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2023-36462
  • GitHub Advisory Database https://github.com/advisories/GHSA-55j9-c3mp-6fcq
  • github.com https://github.com/mastodon/mastodon/security/advisories/GHSA-55j9-c3mp-6fcq