将用户名列表以明文形式发送给浏览器以供JavaScript自动补全，还可以通过使用唯一的用户id调整URL查询字符串来查看用户数据，这可以从自动补全功能中收集到。

测试一些银行柜员软件后，我打电话给技术部安排了一次拨号IP会话。“您想连接到哪个系统，生产系统还是测试系统?”

真实的故事。

我见过很多客户项目，这些项目都包含IP地址、用户名和SQL server数据库的密码。

我工作的公司有很多安全错误……下面是一些比较糟糕的例子:

所有的前雇员仍然拥有所有东西的活跃账户，即使是那些被解雇或关系不好的人 我们开发的每个站点(200多个)都有相同的管理员用户名和密码，所有在这里工作的员工都知道

史诗般的失败。

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.

我见过缓冲区溢出，可以(理论上)通过传真输出。

有一个自动的文件路由过程，它将传真作为输入，对它们进行OCR并提取一些信息，然后在此基础上进行LDAP搜索，等等。 不知道这是不是“最糟糕的”，但肯定让我笑了。