The dates in the email templates are not properly escaped to prevent an XSS attack.
This vulnerability affects the following application versions:
- MonsterInsights 8.20.0
- MonsterInsights 8.20.1
- MonsterInsights 8.21.0
- MonsterInsights 8.22.0
- MonsterInsights 8.23.0
- MonsterInsights 8.23.1