The agency's IT team was the first to discover the breach in July and August and it is likely to be the result of an attack Phishing in the systems of the organization.
Scouts Victoria said it had contacted digital analytics and security experts at cyberspace, to investigate the incident and the data involved in that breach. Prior to this move, the organization's IT team had detected and stopped any further malicious activity.
Extensive investigation has revealed that they may have been violated sensitive information, such as home addresses, credit card information, driving license numbers, birth certificates, criminal history information and court orders.
The data was stored as part of the correspondence between Scouts Victoria members and a "number of people" associated with the organization.
"We have contacted people we know may have been directly affected by this incident and will continue to work with them to address their concerns," said Scouts Victoria.
The Office of the Australian Information and Services Commissioner was also informed of the incident.
Scouts Victoria stated that organization has now "taken appropriate measures to ensure that such incidents do not recur".
"We take privacy obligations very seriously and invest significant resources in investigating the source of the incident."
"While all affected members have been informed, we encourage anyone with questions to contact Scouts Victoria and can address any concerns they may have."
The site Scamwatch The Australian Competition and Consumer Commission has received almost 24.000 reports of e-fishing scams in Australia so far this year, more than 4200 of which were reported in August.