Cannot access website hosted in Plesk: the server responded with a status of 403 (ModSecurity Action) hoặc HTTP Error 403.0 - ModSecurity Action
Thì bạn vào disable Mod_Security trên plesk như sau:
Hoặc Disable luôn mod Security
Disable the ModSecurity rule using its ID from the error message:
- Log in to Plesk GUI
- Go to Domains > example.com > Web Application Firewall
- Specify the rule IDs from the error message on the Logs page and click OK:

Tham khảo:
https://support.plesk.com/hc/en-us/a...curity-Action-