Self-signed certificate
Check id: tls.self_signed · fix effort: medium
What it means
Your site presents a certificate it vouches for itself. Browsers show a full warning page. Free trusted certificates make this a solved problem.
The technical detail
Leaf issuer equals subject with no publicly trusted chain.
How to fix it
- Replace with a publicly trusted certificate. Let's Encrypt is free and automatable.
Does your domain have this problem?
Run a free scan, takes about ten seconds.