Able to view others' gifts on /gift/share URL, giftId is predictable, and easy to manipulate
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I recently purchased a gift for a friend, and noticed the share URL gift ID was simply numeric. I managed to access other people's gifts simply by incrementing and decrementing the ID by 2, I was able to verify that the price was dropped to "Free", regardless of if I was logged in or not, and I was …
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