Mamba.ru 8M

In 2015 the popular Russian dating service Mamba.ru experienced a significant data security incident. This specific dataset contains approximately 8 million user records which represent a substantial portion of the estimated 12.5 million users affected during that period. The breach exposed sensitive personal details including user email addresses and mobile phone numbers. Furthermore the leaked data included passwords stored as MD5 hashes which are considered cryptographically weak and susceptible to cracking via brute force or rainbow table attacks. The incident highlights the risks associated with older hashing algorithms and the massive scale of data exposure in the online dating industry.