SuiteCRM is an open-source Customer Relationship Management (CRM) software application. A vulnerability in versions prior to 8.6.1 allows for Host Header Injection when directly accessing the `/legacy` route. Version 8.6.1 contains a patch for the issue.
https://github.com/salesagility/SuiteCRM-Core/security/advisories/GHSA-3323-hjq3-c6vc