fix: escape HTML in decode_base64 to prevent XSS#742
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The /base64 endpoint returned user-controlled content without escaping, allowing reflected XSS attacks. This fixes the vulnerability by escaping the decoded content before returning it. Fixes postmanlabs#735
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The /base64 endpoint returned user-controlled content without escaping, allowing reflected XSS attacks. This fixes the vulnerability by escaping the decoded content before returning it.
Fixes #735