webPromedium

Medium 4 - Double Escape XSS

web-kids20

XSS challenge from the sibearsxss series. The escape function replaces `</` with `<\/` and `"` with `\"`, but does not escape backslashes themselves.

$ ls tags/ techniques/

xss sibearsxss escape_bypass double_escape backslash_trick

double_escape_xssbackslash_quote_bypass

Analysis

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

$ python3 exploit.py --target 192.168.1.1 --port 8080
[*] Connecting to target...
[+] Shell obtained!

Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

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