fix(security): zone data is suspectible to XSS #101
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Problem
If a record contains string data, it will be rendered as HTML, not escaped as expected. This means that zone data is susceptible to XSS attacks.
Example with
zonetransfer.me:The record in question:
xss 300 IN TXT "'><script>alert('Boo')</script>"Background
When Flask configures a Jinja environment, it provides a list of file types that should be "autoescaped". Since the templates used in this project end with
.j2, they are not escaped.Fix
Now by default for this project, all Flask templates will be rendered with the autoescape functionality.