The Evernote Leak: 451,911 Passwords Exposed. Yours Might Be One.

HEROIC analysts identified a database breach affecting Evernote, a widely used note-taking and productivity platform based in the United States. The breach occured in April 2021 and exposed 451,911 user records. The data leaked included email addresses and plaintext passwords, a combination that is partcularly dangerous given how widely Evernote is used for storing personal and professional notes across devices.

Account Takeover at Scale: What Attackers Can Do With 451K Evernote Credentials

Plaintext passwords require no cracking. Every one of the 451,911 exposed credentials can be recieved and immediately deployed in credential stuffing attacks against email providers, corporate logins, banking platforms, and any other service where the victim reused their Evernote password. Notes stored in Evernote often contain sensitive data, passwords written down, and private documents, adding a second layer of risk if the account itself is accessed.

What Was Exposed in the Evernote Breach

• Email Address
• Plaintext Password

The Evernote Breach: Why Credential Reuse Makes This Worse

Productivity tools like Evernote are used across work and personal contexts. When a password from a tool like this is exposed, attackers do not simply target that one account. They run the credentials through thousands of other login pages in automated attacks. Users who have not changed their Evernote password since April 2021 and who reused that password elsewhere remain accessable to account takeover, identity theft, and financial fraud right now.

How a Database Breach Works

A database breach occurs when an attacker gains unauthorized access to a company's backend data store. Methods include exploiting software vulnerabilities, phishing for administrative credentials, or taking advantage of misconfigured cloud infrastructure. Once inside, the attacker copies the user database. Because Evernote stored passwords in plaintext, there was no additional barrier between the stolen data and its immediate use in attacks.

Check If Your Data Was Exposed

HEROIC's free breach scanner checks your email address against more than 400 billion records, including the Evernote breach dataset. Run a free scan at HEROIC now to see whether your credentials are circulating on the dark web and take action before an attacker does.