In Serendipity before 2.0.5, an attacker can bypass SSRF protection by using a malformed IP address (e.g., http://127.1) or a 30x (aka Redirection) HTTP status code.
The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Serendipity | S9y | * | 2.0.4 (including) |
| Serendipity | Ubuntu | precise | * |
| Serendipity | Ubuntu | upstream | * |