"We are extremely sorry".
"We have been told that there is a very low risk of future misuse", she said.
"We would like to assure you we are doing everything in our power to not only right this but to prevent it from happening again", they said.
"The issue occurred due to human error".
Hunt - whose donor information was actually leaked as a result of this breach - noted that while it was his responsibility to publicly disclose the breach, he expressed concerns that the incident would make people around the world wary of donating blood.
"We have managed to have all known copies of the archive deleted, and have removed the vulnerability from the web developer's server", it added. "That would be one of the most sensitive things in the breach, especially if you answered in the affirmative", he said. Those questions relate to a potential donor's personal life including their travel and sexual histories.
Microsoft employee and technology blogger Troy Hunt, who runs a data breach notification service, reported the person who gained access to the information had contacted him, revealing Mr Hunt's own personal details and a 1.74GB data file containing the records.
The organisation said it was told on Wednesday that a file containing donor information was placed on an "insecure computer environment" and "accessed by an unauthorised person". Hunt also refused to load the data in the Have I Been Pwned? search engine, the second time he chose to take this action after previously deleting the Vtech leaked data because it contained the personal details of small children.
The data also included answers to Red Cross' donor eligibility questions.
Even the terror of Transylvania-Dracula-would be drained biting the necks of all of the over half a million Australian blood donors whose contact information was hacked from a Red Cross database.
"The online forms do not connect to our secure databases which contain more sensitive medical information", Ms Park said.
"Conceivably criminals might have potentially been able to use it for blackmail depending on how much information they were able to get out of it."
"We need your continued support to donate blood and feel confident that this will not reoccur in the future".
Those who were notified that they were on the Red Cross' leaked file have been warned to remain vigilant to scams, online or offline, that may utilize their personal information in phishing attacks for fraudulent purposes.
"We have set up a hotline, website and email address to provide information for donors", Park said.
Precedent was engaged by the blood service to redesign and maintain its core website, www.donateblood.com.au, in 2015.