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KirbyCMS Cross Site Scripting

KirbyCMS Cross Site Scripting
Posted Nov 13, 2017
Authored by Ishaq Mohammed

KirbyCMS versions prior to 2.5.7 suffer from a persistent cross site scripting vulnerability.

tags | exploit, xss
advisories | CVE-2017-16807
MD5 | ab1434ceb1cd9757d687ad7f73ee0cca

KirbyCMS Cross Site Scripting

Change Mirror Download
# Exploit Title: KirbyCMS <2.5.7 Stored Cross Site Scripting
# Vendor Homepage: https://getkirby.com/
# Software Link: https://getkirby.com/try
# Discovered by: Ishaq Mohammed
# Contact: https://twitter.com/security_prince
# Website: https://about.me/security-prince
# Category: webapps
# Platform: PHP
# CVE: CVE-2017-16807

1. Description

A cross-site Scripting (XSS) vulnerability in Kirby Panel before 2.3.3,
2.4.x before 2.4.2, and 2.5.x before 2.5.7 exists when displaying a
specially prepared SVG document that has been uploaded as a content file.

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-16807

2. Proof of Concept

Steps to Reproduce:
Log in as an Editor and click on Site Options
Add the malicious .svg file which contains the javascript to the Site
Login to another browser with Admin Credentials.
Click on Site Options.
Click on the newly added .svg file

3. Reference

https://getkirby.com/changelog/kirby-2-5-7

4. Solution

The vulnerability is patched by the vendor in the version 2.5.7.

--
Best Regards,
Ishaq Mohammed
https://about.me/security-prince
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