James Raj Arokiasamy, 35, has been charged with hacking the Ang Mo Kio Town Council website on Oct 28.
He was charged under the Computer Misuse and Cybersecurity Act for carrying out "unauthorised modifications" to websites including adding an image of the Guy Fawkes mask to the website.
He is alleged to have done these acts from Dorchester Apartments in Kuala Lumpur.
On Tuesday morning, James Raj told the court that he was suffering from Attention Deficit Hyperactivity Disorder and was on medication. His case was adjourned for further mention on Tuesday at 2.30pm.