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CVE-2019-15120

Exploit for XSS via BBCode on Kunena extension before 5.1.14 for Joomla!

Information

Description: In Kunena extension before 5.1.14 for Joomla!, it’s possible for any user to execute a stored XSS attack by sending special message in any field with BBcode support. As a result, the vulnerability can easily leads to RCE. Versions Affected: Kunena extension for Joomla! version 5.x through 5.1.14

Researcher: Andrey Skuratov (https://github.com/h3llraiser/)

Disclosure Link: https://www.kunena.org/blog/207-kunena-5-1-14-released

VEL Link: https://vel.joomla.org/resolved/2260-kunena-5-0-x-5-1-14-xss-cross-site-scripting

NIST CVE Link: https://nvd.nist.gov/vuln/detail/CVE-2019-15120

POC

An example of vector:

[spoiler="qwe<script>alert('PWNED!')</script>"]rty[/spoiler]

Screenshots:

Stored XSS in Kunena extension before 5.1.14 for Joomla! to RCE video demonstration (BONUS)

rce

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Exploit for XSS via BBCode on Kunena extension before 5.1.14 for Joomla!

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