webfinger.js is a TypeScript-based WebFinger client that runs in both browsers and Node.js environments. In versions 2.8.0 and below, the lookup function accepts user addresses for account checking. However, the ActivityPub specification requires preventing access to localhost services in production. This library does not prevent localhost access, only checking for hosts that start with "localhost" and end with a port. Users can exploit this by creating servers that send GET requests with controlled host, path, and port parameters to query services on the instance's host or local network, enabling blind SSRF attacks. This is fixed in version 2.8.1.
CVSS
No CVSS.
References
Configurations
No configuration.
History
04 Aug 2025, 15:06
Type | Values Removed | Values Added |
---|---|---|
Summary |
|
01 Aug 2025, 18:15
Type | Values Removed | Values Added |
---|---|---|
New CVE |
Information
Published : 2025-08-01 18:15
Updated : 2025-08-04 15:06
NVD link : CVE-2025-54590
Mitre link : CVE-2025-54590
CVE.ORG link : CVE-2025-54590
JSON object : View
Products Affected
No product.
CWE
CWE-918
Server-Side Request Forgery (SSRF)