Critical

Improper Neutralization of Input During Web Page Generation in Nukium - NKM GLS module for PrestaShop

Disclosed: 14.11.2023
Updated: 11.10.2026 10:22

In the module “NKM GLS” (nkmgls) up to version 3.0.1 from Nukium for PrestaShop, a guest (authenticated customer) can perform XSS injection of type 2 (stored XSS) from FRONT to BACK (F2B) of Category 2 within the funnel order in affected versions.

Note : To succeed in this exploit, the red team needs to pay to convert a cart into a valid order with GLS carrier and require the administrator of the PS to check a specific screen within its backoffice.

As all XSS type 2 (Stored XSS) F2B (Front to Back), there are two steps and a prerequisite.

Prerequisite :

The field phone_mobile within table gls_cart_carrier suffers from a type varchar(255) which is large enough to allow dangerous XSS payloads.

Steps :

The method NkmGlsCheckoutModuleFrontController::displayAjaxSavePhoneMobile does not properly clean the parameter gls_customer_mobile. pSQL is useless against XSS which exploits HTML tag attributes (Category 2 according to OWASP - pSQL only neutralized Category 1 thanks to its strip_tags).

The output in the backoffice is not escaped in the related smarty template that uses it.

Affected software

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Platform	Package	Vulnerable versions	Fixed in
PrestaShop module	nkmgls	<= 3.0.1 <= 3.0.1 (3.0.2 fixed the vulnerability)	3.0.2

References

https://security.friendsofpresta.org/modules/2023/11/14/nkmgls.html

CVSS score 9/10

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
Weakness (CWE): CWE-79
Platform: PrestaShop
Package: nkmgls
Disclosed: 14.11.2023
Updated: 11.10.2026 10:22

Sources and licenses

Friends-Of-Presta - CVE-2023-47309 - MIT

MIT

The MIT License (MIT)

Copyright (c) 2016-present Parker Moore and the minima contributors

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

Vulnerability history: nkmgls

All published vulnerabilities of this package (PrestaShop module), newest first. Shows whether this is a one-off slip or a package that needs watching.

This is the only known vulnerability of this package.

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