Baserow 2.2.0 through 2.3.3 - SQL injection in formula index() JSONB array extraction

Baserow versions 2.2.0 through 2.3.3 contain an SQL injection vulnerability in the index() formula function. A low-privileged authenticated user who can create or modify Formula fields can provide an undocumented fourth argument that is treated as a SQL template and interpolated directly into a PostgreSQL expression. The generated SQL executes through Baserow's database connection with the Baserow PostgreSQL role permissions, allowing data outside the user's workspace permissions to be read or modified.