In Sprout Forms before 3.9.0, there is a potential Server-Side Template Injection vulnerability when using custom fields in Notification Emails which could lead to the execution of Twig code. This has been fixed in 3.9.0.Referenceshttps://github.com/barrelstrength/craft-sprout-forms/security/advisories/GHSA-px8v-hxxx-2rghhttps://github.com/barrelstrength/craft-sprout-forms/blob/v3/CHANGELOG.md#390---2020-04-09-critical
