我们有一个客户要求根据特定的HTTP引用器自动登录。所以你和我必须登录，但如果你点击了一个特定网站的链接，你就会自动以默认用户登录。

if( $session['role'] = "admin" ) //grant admin rights

只要少一个字符(“=”而不是“==”)，就可以向登录的任何人授予管理权限。你是有罪的。

About 3 years ago I built a site for a somewhat large non-profit organization in our state. When it came time to deploy the application to their web host server, I noticed an odd file named "cc.txt" or something obvious like that in their public site. It was under their web root, was getting served, and was a csv file of all their donor's names, addresses, credit card numbers, expiration dates, and CVV/CVC codes. I cannot count the number of times I brought the issue up - first to my boss, then our company accountant, the client's IT director, finally the client's President. That was 3 years ago. The file is still being served, it can even be googled. And it's been updated. I tend not to respond to their donation solicitations when I get them.

In the 1970's Stanford had IBM 2741 hardcopy terminals spread around campus networked to an IBM 360/67. Account passwords were three characters. During logon, the password prompt would overprint a three-position blob of about nine random uppercase characters, so the subsequently-typed password would supposedly be masked by the blob. However, everyone typed their passwords in lowercase, which were trivial to discern against the uppercase background blob. That meant you could usually walk up to any terminal, peruse the hardcopy typically left behind by the previous user, and easily logon with their account and password.

想到这一点，我所见过的最糟糕的安全漏洞是当管理电子门锁的人说“你是什么意思，锁不知道公共假日”?

是的，每个周一到周五都是公共假日，因为门系统已经安装好了，我看到前门在08:00-17:30没有锁。

我有Joe X以前的家庭地址，需要知道他在同一城市的新地址，但没有办法联系到他。我估计他每天都会收到一堆邮购目录，所以我随意拨打了See’s Candies的800电话(与维多利亚的秘密、瑞士殖民地或任何其他大型邮寄公司不同):

我:“嗨，我是Joe x。我想我已经在你的邮件列表中出现过两次了，我的旧地址和新地址都有。你的电脑显示我的地址是[旧地址]还是[假地址]?”

接线员:“不，我们给你看[新地址]。”