Medium 2 - Regex Single Replacement Bypass

web-kids20

XSS challenge from the sibearsxss series. The escape function uses regex to remove dangerous patterns, but the regex is applied only once (without the `/g` flag).

xss regex_bypass sibearsxss single_replacement sacrificial_pattern

regex_single_replacement_bypasssacrificial_pattern_injection

$ ls tags/ techniques/

xss regex_bypass sibearsxss single_replacement sacrificial_pattern

regex_single_replacement_bypasssacrificial_pattern_injection

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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