GIMP

Meets the B minimum (70/100) in our RFP clause.

With these headers missing, gimp.org is more exposed to clickjacking.

Missing 4

• Permissions-Policy 0 of 10

  Switches off browser features the product does not use, such as camera, microphone, location and payments, for the page and anything embedded in it.

  Without it: Any script or iframe on the page, including third-party ads and chat widgets, can ask the user for camera, microphone or location access under the vendor's name.

• Cross-Origin-Opener-Policy 0 of 5

  Cuts the link between the product's window and windows opened by, or opening, other sites.

  Without it: A page that opens the product keeps a handle on its window and can later redirect it to a look-alike sign-in or payment page (tab-nabbing) while the user thinks they are still on the real site. It is also part of the isolation browsers need to defend against Spectre-style attacks.

• Cross-Origin-Resource-Policy 0 of 5

  Tells browsers which sites may load this site's resources.

  Without it: Other sites can pull the product's responses into their own pages, which makes side-channel leaks of what a signed-in user can see easier.

• No version disclosure 0 of 5

  Keeps the Server and X-Powered-By headers from announcing exact software versions.

  Without it: A header like "nginx/1.18.0" or "PHP/7.4" tells an attacker which known vulnerabilities to try, and flags possibly unpatched software to every automated scanner on the internet.

Sent 5

• Content-Security-Policy 25 of 25

  default-src 'none'; img-src 'self' https://testing.developer.gimp.org https://developer.gimp.org https://blogs.gnome.org; style-src 'self'; script-src 'self' https://www.openhub.net; font-src 'self'; child-src 'self' https://peer.tube https://www.openhub.net https://www.youtube.com https://www.youtube-nocookie.com https://video.blender.org; object-src 'none'; media-src 'self' https://download.gimp.org https://download-fallback.gimp.org https://www.mirrorservice.org https://*.ftp.acc.umu.se https://ftp.rrze.uni-erlangen.de; base-uri 'self'; form-action 'self' https://www.paypal.com https://gitlab.gnome.org https://duckduckgo.com; frame-ancestors 'self';

• Strict-Transport-Security 20 of 20

  max-age=31536000; includeSubDomains; preload

• X-Content-Type-Options 10 of 10

  nosniff

• Frame protection 10 of 10

  SAMEORIGIN

• Referrer-Policy 10 of 10

  same-origin, strict-origin-when-cross-origin

Checked 2026-10-18 at https://www.gimp.org/. Re-checked every 7 days. The grade covers the headers this website sends, not the product’s overall security. How the grade works.