The cyber security incident took place on 14 April and affected part of the company’s systems.
Funky Pigeon took its systems offline as a precaution following the incident, leaving the company unable to fulfil orders.
The company said it was writing to all customers from the past 12 months to inform them of the incident.
In a statement, Funky Pigeon said: “We take the security of customer data extremely seriously and we have temporarily suspended any new orders via the website.
“We have also informed the relevant regulators and law enforcement authorities, and we will continue to review and update our protocols based on what we learn from this incident.”
How well do you really know your competitors?
Access the most comprehensive Company Profiles on the market, powered by GlobalData. Save hours of research. Gain competitive edge.
Your download email will arrive shortly
Not ready to buy yet? Download a free sample
We are confident about the unique quality of our Company Profiles. However, we want you to make the most beneficial decision for your business, so we offer a free sample that you can download by submitting the below formBy GlobalData
WH Smith, which sells books, stationery and other items, confirmed that customer payment data with Funky Pigeon, such as bank account or credit card details, was not compromised due to the incident.
The company processes this data securely using accredited third parties, where it is securely encrypted.
Customer account passwords are also not believed to have been at risk.
Currently, the company is investigating if any personal data, specifically names, addresses, e-mail addresses and personalised card or gift designs, was accessed.
The company added: “We would like to sincerely apologise to our customers for any concern or disruption this may cause and reassure them that our teams are working around the clock to investigate and resolve this incident.
“As our investigation progresses, we will provide further updates to customers and other affected parties as necessary.”
Earlier this month, British discount retailer The Works closed some of its stores in the UK following a cyberattack on its computer systems.