ERPNext is a free and open source Enterprise Resource Planning tool. Prior to 15.109.0 and 16.20.0, the get_tax_template function in erpnext/accounts/doctype/tax_rule/tax_rule.py constructs an SQL WHERE clause from request-influenced posting_date and args values, allowing an authenticated low-privilege user to inject SQL and extract sensitive information. This issue is fixed in versions 15.109.0 and 16.20.0.
https://github.com/frappe/erpnext/security/advisories/GHSA-grhp-m55m-63f8
https://github.com/frappe/erpnext/releases/tag/v16.20.0
https://github.com/frappe/erpnext/releases/tag/v15.109.0
https://github.com/frappe/erpnext/pull/55127
https://github.com/frappe/erpnext/commit/f98975f51a62d611f536368671c3dbaf81d61eb9
https://github.com/frappe/erpnext/commit/c45d2a348777a9bdf697832b6ca129d2f0626fd2
https://github.com/frappe/erpnext/commit/2a91c7229a47ac6a5bb2d8227290b03415bf8baf