CVE-2025-23221

Fedify has an Infinite loop and Blind SSRF found inside the Webfinger mechanism

State: Published
Severity: 5.4 Medium
Published: Jan 20, 2025
Updated: Jan 21, 2025
Reserved: Jan 13, 2025

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.

Scores

CVSS	Score	Vector	Source
3.1	5.4 Medium	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:L	GitHub_M

Weaknesses

CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop')
CWE-918 Server-Side Request Forgery (SSRF)

Affected Products

Product	Versions
fedifydahlia	< 1.0.14Affected >= 1.1.0, < 1.1.11Affected >= 1.2.0, < 1.2.11Affected >= 1.3.0, < 1.3.4Affected

References

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