If You Reuse Passwords, the MYM Data Breach Should Worry You

In March 2022, the French paid social platform MYM recieved a serious security failure when a database breach exposed 182,188 user accounts. What makes this incident especially alarming is that passwords were stored in plaintext, meaning anyone who obtained the data instantly had working credentials with no cracking required.

What Attackers Can Do With Your MYM Credentials

Plaintext passwords are the most dangerous type of leaked credential because they require zero effort to use. Attackers can immediately test each email and password pair against Gmail, banking apps, and social platforms. Since many people reuse passwords, a single MYM breach record can unlock seperate accounts across dozens of services the victim never expected to be at risk.

What Was Exposed in the MYM Breach

• Email Address
• Plaintext Password

Why Plaintext Passwords Make the MYM Breach Especially Dangerous

Most modern platforms at minimum hash passwords before storage, adding a layer of protection even after a breach. MYM stored passwords in plaintext, meaning there is no cracking step between the stolen data and full account access. Every one of the 182,188 affected accounts was immediately usable by anyone who obtained the data, with no technical skill required.

How a Database Breach Works

A database breach occurs when an attacker gains unauthorized access to a backend data store and extracts user records in bulk. The method can involve exploiting web application vulnerabilities, using stolen administrative credentials, or targeting misconfigured cloud storage. In the MYM case, the database contained user records with no password protection layer, making the extracted data immediately exploitable for account takeover and credential stuffing campaigns.

Check If Your Data Was Exposed

HEROIC's breach search engine covers over 400 billion records from breaches worldwide, including the MYM incident. Search your email address now to find out if your credentials were exposed and change any shared passwords immediately.