CVE-2025-23221
Medium
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.
SeverityMedium
CVSS5.4
Exploit probability—
Product@fedify/fedify
PublishedJan 20, 2025
First seenJan 20, 2025
How to fix
Update
- @fedify/fedify1.0.14, 1.1.11, 1.2.11, 1.3.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| @fedify/fedifynpm | 1.0.13 ≤ v < 1.0.14, 1.1.10 ≤ v < 1.1.11, 1.2.10 ≤ v < 1.2.11, 1.3.3 ≤ v < 1.3.4 | 1.0.14, 1.1.11, 1.2.11, 1.3.4 |
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