LibreOffice

Free, open source office suite with a word processor, spreadsheet, presentation and drawing apps that open and save Microsoft Office and OpenDocument formats.

libreoffice.org security headers B 80/100

writing-docs · added 2026-10-17

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Security headers: B, 80 out of 100

Number 32 of 116 in the ranking. Missing 3 of the 9 headers we check.

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

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

Missing 3

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.

Sent 6

Content-Security-Policy 25 of 25

default-src 'none'; connect-src 'self' https://piwik.documentfoundation.org; font-src 'self'; form-action 'self' https://www.paypal.com; frame-src https://www.youtube-nocookie.com https://js.stripe.com/; frame-ancestors 'none'; img-src 'self' data: https://*.documentfoundation.org https://*.tile.openstreetmap.org; script-src 'self' https://*.documentfoundation.org https://js.stripe.com/v3/; style-src 'self'
Strict-Transport-Security 20 of 20

max-age=31557600; includeSubDomains
X-Content-Type-Options 10 of 10

nosniff
Frame protection 10 of 10

DENY
Referrer-Policy 10 of 10

strict-origin-when-cross-origin
No version disclosure 5 of 5

server: nginx

Checked 2026-10-17 at https://www.libreoffice.org/. Re-checked every 7 days. The grade covers the headers this website sends, not the product’s overall security. How the grade works.