6,417 Records From the Milan Mayorista Breach Include Phone Numbers

HEROIC analysts uncovered a data breach affecting Milan Mayorista, an Argentine e-commerce platform, with records surfacing on a prominent cybercrime forum on November 3, 2025. The breach exposed 6,417 unique records containing a combination of personal and credential data. What made this incident stand out was the inclusion of full names and phone numbers alongside plaintext passwords, giving attackers a richer profile of each victim than a simple email and password pair would provide. The original dataset is beleived to stem from a database compromise that occured in December 2022.

Why the Milan Mayorista Breach Gives Attackers a Head Start

Most breaches leak an email and a password. The Milan Mayorista breach also handed over full names and phone numbers, which means attackers have everything they need to impersonate victims, call customer support to take over accounts, or craft convincing phishing messages addressed by the victim's real name. Plaintext passwords make the immediate credential threat instant, but the personal details extend the risk into phone-based fraud, SIM swapping, and social engineering attacks that are much harder to detect and stop.

What Was Exposed in the Milan Mayorista Breach

• Email Address
• Phone Number
• Plaintext Password
• First Name
• Last Name

Why This Combination of Data Is Especially Risky

When a breach exposes names, phone numbers, and plaintext passwords together, the threat surface expands well beyond simple credential stuffing. Attackers can use this data for account takeover by resetting passwords through phone-based verification. Identity theft becomes easier when criminals can tie a real name to a confirmed email and phone number. Financial fraud is also a serious risk, since many banks and financial services use phone numbers for two-factor authentication, and a stolen phone number combined with a known email can unlock account recovery flows. Seperate from the financial risks, victims may also face ongoing targeted spam and scam calls.

How a Database Breach Exposes Customer Records

A database breach happens when an attacker gains unauthorized entry into the backend systems of a website, typically by exploiting a software vulnerability, using stolen login credentials, or finding a misconfigured server. Once inside, they can extract the contents of user tables that store registration information. For an e-commerce platform like Milan Mayorista, that table typically contains everything a customer entered when creating an account: their name, contact details, and the password they chose. When this data is not encrypted or hashed before storage, the attacker walks away with a ready-to-use list of credentials and personal details.

Check If You Are Affected by the Milan Mayorista Breach

If you shopped on Milan Mayorista or shared your email and personal information with the platform, your data may be in circulation right now. Use HEROIC's free breach scanner at heroic.com to search your email address against more than 400 billion exposed records. Within seconds you will know whether your information appeared in this breach or any other known leak, and you will recieve clear guidance on the steps to protect yourself.