Food delivery service DoorDash announced in a blog post on Thursday that the company has suffered a data breach affecting millions of customers, workers, and merchants. 

The firm claims that an unauthorized party managed to access data belonging to 4.9 million DoorDash customers through a third-party service provider. An investigation into the security incident has determined that the unauthorized party accessed DoorDash user data on May 4, 2019. 

Customers who registered with DoorDash on or before April 5, 2018, are said to be impacted by this breach. Email addresses, delivery addresses, order history, phone numbers, and salted and hashed passwords were compromised, as well as the last four digitals of some users' payment cards. 

Data belonging to some of the firm's restaurant clients and delivery drivers were also compromised, specifically the last four digitals of bank account numbers along with the driver's license numbers of 100,000 delivery staff. 

The firm is advising users to reset their credentials for the platform, regardless of the salted and hashed passwords. Security experts claim that despite the firm's efforts to encrypt passwords, the compromised data could still be used in follow on attacks. 

When a company elects to outsource data, security is oftentimes compromised and consumers pay the price with their personal data. It's essential that companies working with third-party providers mandate the adoption of proper cybersecurity controls such as the CIS Controls to ensure that customer and employee data is safe inside and outside of the business. 

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