{"cve":"CVE-2025-23221","nvd":{"published":"2025-01-20T17:15:07.987","modified":"2026-06-17T08:52:45.360","status":"Deferred","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:L","score":5.4},"cwes":["CWE-835","CWE-918"],"references":["https://github.com/dahlia/fedify/commit/8be3c2038eebf4ae12481683a1e809b314be3151","https://github.com/dahlia/fedify/commit/c505eb82fcd6b5b17174c6659c29721bc801ab9a","https://github.com/dahlia/fedify/commit/e921134dd5097586e4563ea80b9e8d1b5460a645","https://github.com/dahlia/fedify/security/advisories/GHSA-c59p-wq67-24wx"],"products":[],"source":"nvd","synced_at":"2026-10-19T21:58:41.599736885+00:00"},"epss":{"cve":"CVE-2025-23221","score":0.00618,"percentile":0.49641,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-c59p-wq67-24wx","url":"https://osv.dev/vulnerability/GHSA-c59p-wq67-24wx","summary":"Infinite loop and Blind SSRF found inside the Webfinger mechanism in @fedify/fedify","modified":"2025-01-21T19:58:29Z","packages":[{"ecosystem":"npm","name":"@fedify/fedify","purl":"pkg:npm/%40fedify/fedify","ranges":[">=1.0.13 <1.0.14"],"fixed":["1.0.14"]},{"ecosystem":"npm","name":"@fedify/fedify","purl":"pkg:npm/%40fedify/fedify","ranges":[">=1.1.10 <1.1.11"],"fixed":["1.1.11"]},{"ecosystem":"npm","name":"@fedify/fedify","purl":"pkg:npm/%40fedify/fedify","ranges":[">=1.2.10 <1.2.11"],"fixed":["1.2.11"]},{"ecosystem":"npm","name":"@fedify/fedify","purl":"pkg:npm/%40fedify/fedify","ranges":[">=1.3.3 <1.3.4"],"fixed":["1.3.4"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}