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April 20, 2026

Mitigating Cross-Site Scripting Attacks

By default, Horizon employs the XSS (cross-site scripting) Filter feature to mitigate cross-site scripting attacks by sending the header x-xss-protection=1; mode=block in its HTTP responses.

You can disable this feature by adding the following entry to the file locked.properties:

x-xss-protection=OFF

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