Credit Cards Are Vulnerable to Brute Force Kind Attacks

Your card may be masked, but commenters say thieves still know the trick

TLDR: A blogger says thieves used pieces of visible card info plus an account breach to hammer his card until they found a merchant with weaker checks. Commenters are fighting over whether this is a terrifying hole in the system, a misunderstood payment issue, or proof refunds make the whole mess merely annoying.

A blogger says his saved credit card was still turned into a shopping spree after crooks got into one online account, and the comments instantly split into three chaotic camps: the worriers, the nitpickers, and the "well actually, the bank paid" crowd. The scary part of the story is simple enough for anyone to get: even if a website only shows part of your card number, your name, and the expiry date, attackers may still be able to figure out enough to try charges elsewhere. In his case, they blasted through several purchase attempts, then found a place that didn't ask for the extra text-message check and drained the card's limit into a wallet that could be turned into cash. Yikes.

But the real fireworks were in the replies. One commenter came in with a plot twist horror story of getting fraud on a brand new, unused card, basically telling everyone: maybe the leak wasn't where you think it was. Another pushed back hard, saying the post skipped a huge detail about how card payments actually work, while others argued big payment companies already fight this kind of guessing game and punish stores that let it happen. Then came the spicy shrug: one reply all but said, didn't the system work if the bank refunded you? That, unsurprisingly, did not have "main character energy" people loved. The most relatable mood? Frustration that stronger anti-fraud checks exist, but in places like the US they're still not used everywhere, leaving everyone else stuck with a weaker status quo.

Key Points

  • The article says PCI DSS sets minimum rules for handling card data, including masking displayed card numbers while still allowing some fields such as BIN, last four digits, name, service code, and expiration date to be shown.
  • It states that full track data, card verification codes, and PIN-related data cannot be displayed or stored under the standard.
  • The author describes a personal fraud incident involving a saved virtual credit card after an account breach at a merchant where the card was stored.
  • According to the article, several unauthorized 3D Secure purchase attempts were made first, followed by successful non-3D-Secure transactions that drained the reduced card limit.
  • The bank later refunded the author after a chargeback request, while the article argues that minimum compliance does not guarantee practical protection against card misuse.

Hottest takes

"the OP may have been chasing red herrings" — julienchastang
"This blog doesn't mention the most critical part" — tialaramex
"you are protected by the fraud infrastructure" — evan_a_a
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