CVE-2025-54590 (GCVE-0-2025-54590)
Vulnerability from cvelistv5 – Published: 2025-08-01 18:03 – Updated: 2025-08-01 18:39
VLAI
EPSS
VEX
Title
webfinger.js is vulnerable to Blind SSRF attacks through localhost
Summary
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.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-08-01 18:39 UTC
CWE
- CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
GitHub_M
CNA
References
3 references
| URL | Tags |
|---|---|
| https://github.com/silverbucket/webfinger.js/secu… | x_refsource_CONFIRM |
| https://github.com/silverbucket/webfinger.js/comm… | x_refsource_MISC |
| https://github.com/silverbucket/webfinger.js/rele… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| silverbucket | webfinger.js |
Affected:
< 2.8.1
|
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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