Bom dia,
Se utilizarem Firebird 2.5.x aconselho a fazer o upgrade para a versão 2.5.7.
https://www.firebirdsql.org/file/documentation/release_notes/html/en/2_5/rnfb25-general.html#notes-257
This sub-release comes with a handful of bug fixes, including addressing a serious security vulnerability present in all preceding Firebird 2.5 releases.
Warning
The exploit is available to authenticated users only, somewhat limiting the risks. However, it is strongly recommended that any previous V.2.5.x installation be upgraded to this one without delay.