CVE-2025-23221

MEDIUM

Fedify 1.0.13-1.0.13, 1.1.0-1.1.10, 1.2.0-1.2.10, 1.3.0-1.3.3 - Denial of Service via Webfinger Mechanism

Title source: llm
STIX 2.1

Description

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.

References (4)

Core 4

Scores

CVSS v3 5.4
EPSS 0.0055
EPSS Percentile 41.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:L

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-835 CWE-918
Status published
Products (5)
dahlia/fedify < 1.0.14
dahlia/fedify >= 1.1.0, < 1.1.11
dahlia/fedify >= 1.2.0, < 1.2.11
dahlia/fedify >= 1.3.0, < 1.3.4
fedify/fedify 1.0.13 - 1.0.14npm
Published Jan 20, 2025
Tracked Since Feb 18, 2026