How to fix info disclosure server on Magento Open Source

Steps for Magento Open Source

1. Same web-server-level fix as Adobe Commerce: for nginx add `server_tokens off;`, for Apache add `ServerTokens Prod` and `ServerSignature Off` to the server config.
2. If hosted on a shared host with cPanel: log in to cPanel → File Manager → edit `.htaccess` in the site root → add `Header unset Server` (requires `mod_headers` to be enabled by your host).
3. Alternatively, install a WAF or reverse proxy (e.g., Cloudflare free tier) in front of your Magento store and configure it to strip the `Server` header.
4. Verify with `curl -I https://yourstore.com`.

What is info disclosure server?

Every time a visitor's browser (or a hacker's scanner) requests a page from your store, your web server sends back a collection of HTTP headers alongside the page content. One of these is the `Server` header — for example, `Server: nginx/1.25.5` or `Server: Apache/2.4.58 (Ubuntu)`. This header broadcasts exactly which server software you are running and, critically, which version. It is visible to anyone using a browser's developer tools, a command-line tool like `curl`, or an automated vulnerability scanner. Hiding or removing it takes only a small configuration change and immediately stops your server from volunteering this information.

Attackers routinely scan millions of websites, harvest version numbers from `Server` headers, and then look up known CVEs (publicly disclosed vulnerabilities) for that exact software version. If your server announces `nginx/1.25.5`, a malicious actor instantly knows which published exploits to try — no guesswork required. Removing the header does not make your server invulnerable, but it eliminates the easiest first step in a targeted attack, increasing the cost and effort for an adversary. This is classified under OWASP A05:2021 Security Misconfiguration — one of the most common causes of real-world breaches. Beyond security, some enterprise procurement and compliance processes (PCI-DSS, ISO 27001) explicitly flag verbose server banners as a finding that must be remediated before certification.

See the complete Info disclosure server guide for every platform and the full background.