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Squarespace fix guide

Missing X-Content-Type-Options Header on Squarespace

Without X-Content-Type-Options: nosniff, browsers may MIME-sniff responses away from the declared content type, enabling attacks.

Issue ID: SEC-XCTO-001Severity: moderateEffort: S

Why this matters

Without X-Content-Type-Options: nosniff, browsers may MIME-sniff responses away from the declared content type, enabling attacks. This affects browser trust signals and whether visitors feel safe submitting contact details.

Squarespace fix path

How to fix this on Squarespace

Check page settings, navigation, and code injection.

  1. 1Identify whether this is page-level or site-level.
  2. 2Apply the fix.
  3. 3Republish and confirm.

After you fix it

  • Check response headers for X-Content-Type-Options: nosniff

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