Plesk Telegram Leak Exposed 2,812 US Emails and Passwords

In April 2026, HEROIC analysts identified a combolist file circulating on Telegram, uploaded by a user under the name "Plesk." The file contained 2,812 records pairing email addresses with plaintext passwords and related URLs, most likely assembled from older, previously circulated breach data rather than a single fresh hack.

Why the Plesk Combolist Leak Is Dangerous

The passwords in this file are stored in plaintext, meaning anyone who downloads the list can read them instantly with no cracking required. Combined with matching email addresses and URLs, an attacker has everything needed to try logging into other accounts that share the same password, a technique known as credential stuffing.

What Was Exposed

• Email addresses
• Plaintext passwords
• Associated URLs

Why This Matters

Even a smaller leak like this one carries real risk. If you reused a leaked password on another site, banking, email, or social media account, an attacker can attempt automated logins across dozens of platforms in minutes. Successful account takeover can lead to identity theft, financial fraud, or a compromised email account being used to reset passwords on everything else you own.

How This Combolist Was Likely Built

A combolist is a compiled file of email or username and password pairs, usually pulled together from multiple older breaches and malware infections rather than one single incident. Cybercriminals trade these files on Telegram channels and dark web forums, then use them to run automated login attempts against popular websites. The URLs included in this file were likely the exact sites the credentials were tested against or stolen from.

Check If Your Credentials Are in the Plesk Leak

If you are unsure whether your information appears in this or any other leaked dataset, HEROIC's free breach scanner checks your email address against a database of more than 400 billion leaked records, including combolists like this one. It takes seconds to check, and if you find a match, changing that password everywhere you used it is the fastest way to shut the door on attackers.