There are many security vulnerabilities that exist in Firebird 2.0. Following is the list of them: -
CVE-2007-3181
CVE-2007-3527
CVE-2007-4664
CVE-2007-4665
CVE-2007-4666
CVE-2007-4667
CVE-2007-4668
CVE-2007-4669
CVE-2007-5246
CVE-2008-0387
CVE-2008-0467
CVE-2009-2620
If LibreOffice is using 3.0 or above then it should be fine.
Can somebody confirm the same?