This just means that the program checked if a situation was OK, then later used that information, but an attacker can change the situation between those two steps.

这只说明了程序检查某种情形是否可行，然后稍后使用那一信息，但是攻击者可能会在这两个步骤之间改变该情形。

youdao

If the file is specified by setting the INFORMIXSQLHOSTS environment variable, then the owner and group are not checked, but public write permissions are not permitted.

如果用INFORMIXSQLHOSTS环境变量设置该文件，则不检查所有者和组，但是仍然不允许对其使用公共写权限。

youdao

Sendmail checked that "debug flag" values weren't larger than the legal value, but it didn't check if the number was negative.

sendmail会检查“调试标记”是不是比合法的值大，但是它并没有去检查这个值是不是负数。

youdao

Many insurance companies won't pay for a diabetic to see a nutritionist to learn how to eat properly or a podiatrist to get their feet checked, but if you wind up having to have your foot amputated from complications due to diabetes, the insurance company will pay for that.

CNN: Clinton's September 17, 2007, speech on health care

On the World at One this lunchtime Mrs May said that everything in her speech "was checked before I said them" but conceded that if someone "has said something different then we will look at that".

BBC: Government v Judiciary on Article 8

"I can't remember if I mentioned the dentures, but it was a duty doctor and her throat wasn't checked, " she said.

BBC: False teeth stuck in woman's throat for nine weeks