In SilverStripe through 4.6.0-rc1, a FormField with square brackets in the field name skips validation.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-26138
Reference (s):
- https://www.silverstripe.org/download/security-releases/
- https://forum.silverstripe.org/c/releases
- https://www.silverstripe.org/blog/tag/release
- https://www.silverstripe.org/download/security-releases/cve-2020-26138