Gnosis Pay: data leak for holders of its crypto card

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https://cryptoast.fr/gnosis-pay-fuite-donnees-cartes-crypto-clients/

Gnosis Pay, which offers a Visa card powered by cryptocurrencies, acknowledges a data leak targeting its individual customers. According to one affected user, the attackers collected names, postal addresses, card numbers and wallet addresses. The company assures that the funds are intact. The risk of targeted scams increases significantly.

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This Friday, each affected customer received an email from Gnosis Pay detailing the information stolen from their account. The company, from the Gnosis ecosystem, has been marketing a crypto card since 2023 which allows payment at merchants with funds held on the blockchain.

On November 3, its monitoring tools detected unauthorized access to the system that operates cards sold under the Gnosis Pay brand, intended for individuals. The security team began blocking the intrusion less than 2 hours later. She then replaced the compromised credentials and fixed the flaw.

Gnosis Pay says its business platform, which powers cards distributed by other companies under their own names, has not been affected. The hacked system was scheduled to shut down on December 20, 2026 anyway, when the company abandons consumer cards to focus on its business customers.

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The company does not publicly detail the nature of the stolen data. Lefteris Karapetsas, a well-known figure in the Ethereum ecosystem and former client, published on X the list that was sent to him: full name, home address, card number and all wallet addresses linked to his account.

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“You had already lost me as a user, but you could have at least protected my data,” he responded. With the contents of a wallet address being viewable by anyone on the blockchain, an attacker can now link a customer's crypto assets to their place of residence.

Gnosis Pay has increased monitoring of card payments and wallets to spot fraud attempts. It also imposes 3D Secure, an additional validation on the phone, for all online purchases, until the system is shut down.

The company has notified its partners, the relevant data protection authorities and Monavate, the British electronic money institution which issues the Visa-licensed card.

Machine-translated from French