How to stop potential redirect exploit?

1. Output of caddy version:

v2.4.6 h1:HGkGICFGvyrodcqOOclHKfvJC0qTU7vny/7FhYp9hNw=

2. How I run Caddy:

a. System environment:

Ubuntu 20.04

d. My complete Caddy config:

{$HOST} {
  handle /api* {
    reverse_proxy api:{$API_PORT}
  handle /uploads* {
    reverse_proxy api:{$API_PORT}
  handle {
    root * /var/www/praise
    try_files {path} /index.html
    encode zstd gzip

3. The problem I’m having:

I have gotten reports that our website is open to redirect exploits. And, clicking on the below link confirms this, the user is indeed redirected to an unintended external domain.

I have tried all sorts of regular expressions and path matchers but I’m not able to figure out how to capture the above path and prevent the redirect from happening. Ideally I would like to prevent any redirects and allow only the paths I specifically specify.

Just update to v2.5.2.

1 Like

(Also, an “open redirect” is a client problem more than a server problem. GIGO.)


… you mean users should not click on links that have baked into them?

Thank you for the quick response!

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