A user on Quizlet, an online learning platform, created a public flashcard set in February that appears to have exposed highly confidential information about security procedures in US Customs and Border Protection facilities around Kingsville, Texas.

The Quizlet set, titled “USBP Review,” was available to the public until March 20, when it was made private less than half an hour after WIRED messaged a phone number potentially linked to the Quizlet user. Though an individual with the user’s name was listed at an address of an apartment less than a mile from a Kingsville CBP facility, WIRED has not been able to verify that the flashcard set was created by an active CBP agent or contractor.

“This incident is being reviewed by CBP’s Office of Professional Responsibility,” a CBP spokesperson wrote in a statement to WIRED. “We will not be getting ahead of this review. A review should not be taken as an indication of wrongdoing.”

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Origianl Creator:
Sammy Sussman, WIRED.com

Original Link: https://arstechnica.com/security/2026/04/cbp-facility-codes-sure-seem-to-have-leaked-via-online-flashcards/
Originally Posted: Sun, 05 Apr 2026 11:07:27 +0000