VULNERABILITY INTELLIGENCE

CVE-2023-42450

CVSS score5.4 MEDIUM
EPSS probability0.46%
CISA KEVNot currently listed
Published2023-09-19
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N

Description

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.

Weakness classification

  • security-advisories@github.com: CWE-113

Primary references