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The cybercrime forum Carding Mafia, which was used for the theft and trading of stolen credit cards, suffered two separate data breaches in 2021 that together exposed records tied to nearly 600,000 member accounts. One breach in March 2021 affected nearly 300,000 members, while a second breach in December 2021 exposed more than 300,000 more, showing repeated compromise of the same criminal platform within nine months.
Across the two incidents, the leaked data included email addresses, usernames, IP addresses, and passwords hashed with salted MD5. Both breaches were classified as sensitive and were not made publicly searchable by Have I Been Pwned, but the disclosures highlight that even illicit forums can become sources of credential exposure, infrastructure intelligence, and attribution data for defenders and investigators.
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2 events from the most recent confirmed update back to the earliest known activity.
In December 2021, Carding Mafia experienced another data breach roughly nine months after the earlier incident. This breach exposed more than 300,000 members' email addresses, usernames, IP addresses, and salted MD5 password hashes.
In March 2021, the Carding Mafia cybercrime forum suffered a data breach affecting nearly 300,000 members. Exposed data included email addresses, usernames, IP addresses, and passwords stored as salted MD5 hashes.
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BreachForums suffered repeated compromises that exposed member data across multiple iterations of the cybercrime forum. An earlier breach leaked details on about **4,000 members**, while a later incident tied to the forum's reboot reportedly spilled data on roughly **325,000 users**, underscoring the scale of exposure affecting one of the most prominent underground marketplaces. Reporting on the more recent compromise said the forum was hit through a **MyBB `0-day`** affecting unpatched software, with forum administrators claiming the intrusion was also linked to a broader law-enforcement crackdown. The incident disrupted the platform, prompted leadership changes including the emergence of a new admin, and highlighted how even criminal forums remain vulnerable to the same software flaws, operational failures, and data-security lapses that they routinely exploit in others.
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Two breaches tied to the **Nulled** cybercrime forum ecosystem exposed large volumes of member data and private communications after attackers compromised both `Nulled.cr` and `Nulled.ch`. The larger incident hit `Nulled.cr`, where a 2016 hack exposed about **599,000 user accounts** and was later leaked publicly, including email addresses, IP addresses, usernames, weak salted MD5 password hashes, and hundreds of thousands of private messages between members. A separate breach affected `Nulled.ch`, where a 2020 compromise exposed more than **43,000 records** after the stolen data was published on a rival hacking forum. The leaked information included IP addresses, email addresses, usernames, salted MD5 password hashes, and the private message history of the site's administrator, underscoring repeated security failures across closely associated underground forum infrastructure.
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Dark web carding marketplace **B1ack’s Stash** released about **4.6 million stolen credit card records** for free after accusing some sellers of reselling data purchased on its platform through rival shops. The forum said it removed roughly **8 million `CVV2` records** from active inventory and moved 4.6 million into its freebies section, while allowing some trusted sellers to seek reinstatement through support channels. Reporting cited by SC Media and analysis from SOCRadar indicate the exposed dataset is largely authentic, with about **4.3 million records** assessed as fresh after excluding duplicates, expired cards, and previously known entries. The leaked records reportedly include full payment card data along with extensive personally identifiable information, including names, billing addresses, email addresses, phone numbers, and IP addresses. Researchers said the breadth of the data suggests collection through **e-skimming** or **phishing**, and warned of immediate risks including card-not-present fraud, identity theft, targeted phishing, and credential abuse. Most affected cards are tied to the **United States**, with significant exposure also reported in **Canada, the United Kingdom, France, and Malaysia**, underscoring the international scope of the breach and B1ack’s Stash’s continued use of free data dumps to build notoriety in the cybercrime market.
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