Frappe is a full-stack web application framework. Versions 14.99.5 and below and 15.0.0 through 15.80.1 include requests that are vulnerable to path traversal attacks. Arbitrary files from the server could be retrieved due to a lack of proper sanitization on some requests. This issue is fixed in versions 14.99.6 and 15.88.1. To workaround, changing the setup to use a reverse proxy is recommended.
https://github.com/frappe/frappe/security/advisories/GHSA-xj39-3g4p-f46v
https://github.com/frappe/frappe/commit/959efd6a498cfaeaf7d4e0ab6cca78c36192d34d
https://github.com/frappe/frappe/commit/3867fb112c3f7be1a863e40f19e9235719f784fb