Sunderland city council became victim of a cyber incident due to which the details of 45 of the 145,000 user accounts on the database were accessed by the attackers.
The council said it is working with the external company which hosts and provides the database and the Information Commissioner's Office to investigate the incident.
While the company said that there is no evidence to suggest that this data has been used inappropriately.
The type of data accessed can be used as a starting point to seek further information about a person to commit identity theft or fraud including names, dates of birth and telephone numbers.
"id": "SUN224019323",
"linkid": "sunderland-city-council",
"type": "Data Leak",
"date": "02/2019",
"severity": "50",
"impact": "2",
"explanation": "Attack limited on finance or reputation"