CVSS 3.1
5.4 mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:LCVE-2025-23221
Medium (5.4). EPSS 0.6% chance of exploitation in the next 30 days. Fixed in @fedify/fedify 1.0.14, 1.1.11, 1.2.11.
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.
Severity
- EPSS
- 0.6% chance of exploitation in the next 30 days; higher than 49% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-835, CWE-918
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-c59p-wq67-24wx | npm | @fedify/fedify | >=1.0.13 <1.0.14 | 1.0.14 |
| GHSA-c59p-wq67-24wx | npm | @fedify/fedify | >=1.1.10 <1.1.11 | 1.1.11 |
| GHSA-c59p-wq67-24wx | npm | @fedify/fedify | >=1.2.10 <1.2.11 | 1.2.11 |
| GHSA-c59p-wq67-24wx | npm | @fedify/fedify | >=1.3.3 <1.3.4 | 1.3.4 |
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