Description
Shlink contains a server-side request forgery vulnerability that allows authenticated API key holders to cause the server to issue arbitrary HTTP GET requests by supplying a crafted long URL during short URL creation with title auto-resolution enabled. Attackers can submit URLs pointing to public hosts that redirect to internal targets, including loopback addresses, link-local ranges, and cloud metadata endpoints such as 169.254.169.254, to exfiltrate internal service information via the HTML title element returned in the short URL creation response.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| shlinkio | Shlink | — | — |
References
- GitHub Security Advisory vendor-advisory
- Product Repository product
- https://www.vulncheck.com/advisories/shlink-server-side-request-forgery-via-short-url-title-auto-resolution third-party-advisory