Vulnerability Database

314,453

Total vulnerabilities in the database

CVE-2023-42450

Mastodon is a free, open-source social network server based on ActivityPub. Starting in version 4.2.0-beta1 and prior to version 4.2.0-rc2, by crafting specific input, attackers can inject arbitrary data into HTTP requests issued by Mastodon. This can be used to perform confused deputy attacks if the server configuration includes ALLOWED_PRIVATE_ADDRESSES to allow access to local exploitable services. Version 4.2.0-rc2 has a patch for the issue.

  • Published: Sep 19, 2023
  • Updated: Nov 16, 2025
  • CVE: CVE-2023-42450
  • Severity: Medium
  • Exploit:

CVSS v3:

  • Severity: Medium
  • Score: 5.4
  • AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N

CWEs:

Software From Fixed in
joinmastodon / mastodon 4.2.0-beta1 4.2.0-beta1.x
joinmastodon / mastodon 4.2.0-beta2 4.2.0-beta2.x
joinmastodon / mastodon 4.2.0-beta3 4.2.0-beta3.x
joinmastodon / mastodon 4.2.0-rc1 4.2.0-rc1.x