SuiteCRM is an open-source, enterprise-ready Customer Relationship Management (CRM) software application. Prior to versions 7.15.1 and 8.9.3, the action_exportCustom function in modules/ModuleBuilder/controller.php fails to properly neutralize path traversal sequences in the $modules and $name parameters. Both parameters later reach the exportCustom function in modules/ModuleBuilder/MB/MBPackage.php where they are both utilized in constructing s paths for file reading and writing.

As such, it is possible for a user with access to the ModuleBuilder module, generally an administrator, to craft a request that can copy the content of any readable directory on the underlying host into the web root, making them readable. As the ModuleBuilder module is part of both major versions 7 and 8, both current major versions are affected. This vulnerability allows an attacker to copy any readable directory into the web root.

This includes system files like the content of `/etc, or the root directory of the web server, potentially exposing secrets and environment variables. Versions 7.15.1 and 8.9.3 patch the issue.