Security Recommendations

By implementing a Content Security Policy, you can use browser features to mitigate many cross-site scripting attacks.

These directives are required for Microform Integration:

Security Policy	Sandbox	Production
`frame-src`	`https://testflex.cybersource.com/`	`https://flex.cybersource.com/`
`child-src`	`https://testflex.cybersource.com/`	`https://flex.cybersource.com/`
`script-src`	`https://testflex.cybersource.com/`	`https://flex.cybersource.com/`

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Last published: September 29, 2026