Detections
Analytics
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.
References
https://github.com/dahlia/fedify/security/advisories/GHSA-c59p-wq67-24wx
https://github.com/dahlia/fedify/commit/e921134dd5097586e4563ea80b9e8d1b5460a645
https://github.com/dahlia/fedify/commit/c505eb82fcd6b5b17174c6659c29721bc801ab9a
https://github.com/dahlia/fedify/commit/8be3c2038eebf4ae12481683a1e809b314be3151