Under Armour is notifying users of its MyFitnessPal food and nutrition app about a data security breach.

The company said its MyFitnessPal team learned on March 25 that an unauthorized party acquired data associated with MyFitnessPal user accounts in late February 2018.

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MyFitnessPal data breach: What you need to know

According to the investigation, the affected information includes usernames, email addresses and hashed passwords for 150 million user accounts.

However, Social Security numbers, driver’s license numbers and payment card data were not obtained.

Under Armour said it began notifying the MyFitnessPal community of the issue via email and through in-app messaging four days after learning of the data breach.

MyFitnessPal users will be required to change their passwords and are urged to do so immediately.

Here’s the email that was sent to MyFitnessPal users:

March 29, 2018

To the MyFitnessPal Community:

We are writing to notify you about an issue that may involve your MyFitnessPal account information. We understand that you value your privacy and we take the protection of your information seriously.

What Happened?

On March 25, 2018, we became aware that during February of this year an unauthorized party acquired data associated with MyFitnessPal user accounts.

What Information Was Involved?

The affected information included usernames, email addresses, and hashed passwords – the majority with the hashing function called bcrypt used to secure passwords.

What We Are Doing

Once we became aware, we quickly took steps to determine the nature and scope of the issue. We are working with leading data security firms to assist in our investigation. We have also notified and are coordinating with law enforcement authorities.

We are taking steps to protect our community, including the following:

• We are notifying MyFitnessPal users to provide information on how they can protect their data.
• We will be requiring MyFitnessPal users to change their passwords and urge users to do so immediately.
• We continue to monitor for suspicious activity and to coordinate with law enforcement authorities.
• We continue to make enhancements to our systems to detect and prevent unauthorized access to user information.

What You Can Do

We take our obligation to safeguard your personal data very seriously and are alerting you about this issue so you can take steps to help protect your information. We recommend you:

• Change your password for any other account on which you used the same or similar information used for your MyFitnessPal account.
• Review your accounts for suspicious activity.
• Be cautious of any unsolicited communications that ask for your personal data or refer you to a web page asking for personal data.
• Avoid clicking on links or downloading attachments from suspicious emails.

For More Information

For more information, please go to https://content.myfitnesspal.com/security-information/FAQ.html.

Sincerely,

Paul Fipps
Chief Digital Officer