Security Advisory: Corrected a vulnerability involving personal information of member

December 22, 2015

Sanrio Digital

EN / CH / JP

Security Advisory: Corrected a vulnerability involving personal information of members

Sanrio Digital notifies that personal information belonging to members of the consumer website was publicly accessible owing to a security vulnerability. The vulnerability has been corrected and investigations are underway. To our knowledge at this time, no personal information of users was stolen or exposed.

On December 19, it was revealed by security researcher Chris Vickery that personal information (such as names, date of birth, gender) belonging to members was accessible by someone who knew the IP addresses of specific vulnerable servers.

The vulnerable data did not include credit card information or other payment information. Users’ passwords were accessible but remained securely encrypted with the cryptographic hash function SHA-1.

Please note that membership data of SanrioTown is not shared with other Sanrio services or websites (such as, therefore other Sanrio services were not affected by this security vulnerability.

We investigated the problem and applied fixes, including securing the servers identified as vulnerable by Mr Vickery.

We are conducting an internal investigation and security review into this incident; at this time we have no indication that users’ personal information was stolen by malicious parties.

We apologize deeply for any concern and inconvenience this incident may have caused.

Detailed Information

1. Personal user information that may have been accessible:

First and last name

Birthday (encoded)



Email address

Password (encrypted using SHA-1 hashes)

Password hint questions

2. Number of people whose personal information may have been leaked

Up to 3.3 million website members were potentially affected by this security vulnerability, however we have no indication that any user data was actually exposed or utilized by malicious parties.

3. Circumstances

Owing to server misconfiguration, some personal information of members was visible to security researcher Mr Chris Vickery.

4. Response going forward

We are requesting SanrioTown users to change their passwords on SanrioTown as well as passwords on other online services and accounts if they used similar passwords or hint questions.

5. Measures to prevent reocurrence

We installed additional security mechanisms on our servers.  We will carry out periodic review of these security measures

6. Inquiries

General inquiries:

Please contact Sanrio Digital at

Media inquiries only:

Mark Leeper (on behalf of Sanrio Digital)

Managing Director

Matrix Communications Limited


Tel: +852 9142-1510