URL redirection to untrusted site (‘open redirect’)
Description
This site was found to allow open redirects from user supplied input. Open redirects are commonly
abused in phishing attacks where the original domain or URL looks like a legitimate link, but then
redirects a user to a malicious site. An example would be
https://example.com/redirect?url=https://%62%61%64%2e%63%6f%6d%2f%66%61%6b%65%6c%6f%67%69%6e which,
when decoded turns into bad.com/fakelogin.
Remediation
Never redirect a client based on user input found in a GET request. It is recommended that the list
of target links to redirect a user to are contained server side, and retrieved using a numerical value
as an index to return the link to be redirected to. For example, /redirect?id=1 would cause the
application to look up the 1 index and return a URL such as https://example.com. This URL would
then be used to redirect the user, using the 301 response code and Location header.
Details
| ID | Aggregated | CWE | Type | Risk |
|---|---|---|---|---|
| 601.1 | true | 601 | Passive | Low |