Your Personal Data Is Now at Risk Because of the Adda.io Breach

HEROIC analysts uncovered a database breach affecting Adda.io, a SaaS platform used for residential community management, with the leak dated to March 10, 2025. The incident exposed 1,857,967 records, each containing a combination of full names, email addresses, phone numbers, and MD5 hashed passwords. Adda.io operates across the United States, serving residential communities, homeowners associations, and property managers, meaning the people affected are everyday residents whose personal contact and account data is now in the hands of unauthorized parties.

Why the Adda.io Breach Is a Serious Threat to Affected Users

MD5 password hashes sound secure but they are not. MD5 is a decades-old algorithm that was never designed for password storage, and it is trivially crackable using tools that have been freely available for years. A threat actor who obtains an MD5 hash can run it through a lookup table or brute force attack and recover the original password in minutes for most common passwords. Combined with the email address in the same record, this gives attackers a ready-to-use credential pair. Additionaly, having your full name and phone number exposed means you become a target for social engineering, SIM swapping, and phishing calls designed to extract even more sensitive information from you directly.

What Was Exposed in the Adda.io Breach

• Email addresses (1,857,967 records)
• First names and last names
• Phone numbers
• MD5 hashed passwords

Why This Matters for Residential Community Members

Platforms like Adda.io often hold more than just login credentials. Residents who use community management tools may have payment history, unit details, and communication records tied to their accounts. With email addresses and crackable passwords in hand, attackers can attempt credential stuffing against banking apps, email providers, and other services where users may have reused the same password. Phone numbers open the door to SIM swapping, which can allow attackers to bypass two-factor authentication on financial accounts. Identity theft and finencial fraud are realistic outcomes for anyone whose data was included in this breach, particularly if they have not updated their Adda.io password and reused it elsewhere.

How Database Breaches Happen

A database breach occurs when an unauthorized party gains access to a company's stored data, typically by exploiting a software vulnerability, a misconfigured server, weak access controls, or compromised employee credentials. Once inside, attackers can copy entire tables of user records without triggering obvious alarms. The data is then sold or distributed on underground forums and Telegram channels. In many cases, companies do not detect the intrusion until weeks or months after the fact, by which point the data has already spread widely. The Adda.io breach follows this pattern, with records appearing in known data trading communities before any public disclosure had been made.

Check If Your Adda.io Data Was Exposed

HEROIC's free breach scanner searches across more than 400 billion compromised records to tell you exactly which breaches your email address has appeared in. If your Adda.io account information was captured in this leak, you will see it when you scan. Visit HEROIC.com, enter your email, and get your results instantly at no cost. If you are affected, change your Adda.io password immediately and update it anywhere you may have used the same password.