5,353,134 Plaintext Passwords Dumped in Mansory 17 Leak

HEROIC identified a massive stealer log known as Mansory 17 that surfaced on Telegram in December 2025. The file contains 5,353,134 compromised records, each pairing an email address with its plaintext password and the URL of the targeted service. At this scale, millions of accounts are now at immediate risk of unauthorized access.

The Threat of Unencrypted Passwords at Scale

Every password in the Mansory 17 dataset is stored in plaintext with zero obfuscation. Attackers do not need to crack hashes or run decryption tools. They can simply read passwords as-is and use them to log in. When over five million credentials are exposed this way, the window for exploitation is enormous.

What Was Exposed

• Email addresses linked to user accounts across many platforms
• Plaintext passwords with no encryption or hashing applied
• URLs revealing which websites and services were compromised

Why Reusing Passwords Multiplies the Damage

Credential stuffing is an automated attack where stolen username-password combinations are tested across hundreds of websites in minutes. Because so many people reuse passwords, a single leaked credential often unlocks email, banking, shopping, and social media accounts. With 5,353,134 records in play, this leak provides attackers with an enormous ammunition stockpile.

Understanding Stealer Logs and Infostealer Malware

Infostealers are a category of malware designed to silently extract saved passwords, cookies, and autofill data from web browsers on infected machines. Once collected, these stolen credentials are packaged into stealer logs and distributed across Telegram channels and dark web marketplaces. Users typically have no idea their data has been harvested until it appears in a breach database.

Check If Your Credentials Were Exposed

With over 5.3 million records in the Mansory 17 leak, the chances of being affected are significant. Use the HEROIC breach scanner to search your email address against more than 400 billion compromised records. Finding out now gives you the chance to change passwords and enable two-factor authentication before attackers strike.