Sam's Club's customers were receiving password reset emails and security notifications as it was targeted in credential stuffing attacks.
The attack did not involve any data breach but was a result of trying previously leaked username-password combinations to get access to the website.
"id": "SAM201110222",
"linkid": "sam%27s-club",
"type": "Cyber Attack",
"date": "10/2020",
"severity": "70",
"impact": "1",
"explanation": "Attack without any consequences"