CVE-2025-23221 MEDIUM

CVE-2025-23221: Fedify has an Infinite loop and Blind SSRF found inside the Webfinger mechanism

Vendor Dahlia
Product fedify
Weakness CWE-835
Published January 20, 2025
Last update January 21, 2025
View on NVD All CVEs

CVSS base score

5.4/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Confidentiality Low
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:L

What the vulnerability does

01Description

Fedify is a TypeScript library for building federated server apps powered by ActivityPub and other standards. This vulnerability allows a user to maneuver the Webfinger mechanism to perform a GET request to any internal resource on any Host, Port, URL combination regardless of present security mechanisms, and forcing the victim’s server into an infinite loop causing Denial of Service. Moreover, this issue can also be maneuvered into performing a Blind SSRF attack. This vulnerability is fixed in 1.0.14, 1.1.11, 1.2.11, and 1.3.4.

Key dates

02Disclosure timeline

January 20, 2025 CVE published
January 21, 2025 Record updated