This article is a part of our Vulnerability Database (back to index)

Cross-site Scripting occurrences in Opencart

OpenCart 3.0.3.6 is affected by cross-site scripting (XSS) in the Profile Image. An admin can upload a profile image as a malicious code using JavaScript. Whenever anyone will see the profile picture, the code will execute and XSS will trigger. (2020-12-29, CVE-2020-29471)

OpenCart 3.0.3.6 is affected by cross-site scripting (XSS) in the Subject field of mail. This vulnerability can allow an attacker to inject the XSS payload in the Subject field of the mail and each time any user will open that mail of the website, the XSS triggers and the attacker can able to steal the cookie according to the crafted payload. (2020-12-29, CVE-2020-29470)

** DISPUTED ** OpenCart 3.0.3.3 allows remote authenticated users to conduct XSS attacks via a crafted filename in the users' image upload section because of a lack of entity encoding. NOTE: this issue exists because of an incomplete fix for CVE-2020-10596. The vendor states "this is not a massive issue as you are still required to be logged into the admin." (2020-06-09, CVE-2020-13980)

OpenCart 3.0.3.2 allows remote authenticated users to conduct XSS attacks via a crafted filename in the users' image upload section. (2020-03-17, CVE-2020-10596)

OpenCart 3.x, when the attacker has login access to the admin panel, allows stored XSS within the Source/HTML editing feature of the Categories, Product, and Information pages. (2019-08-15, CVE-2019-15081)

Why Cross-site Scripting can be dangerous

Cross site scripting is an attack where a web page executes code that is injected by an adversary. It usually appears, when users input is presented. This attack can be used to impersonate a user, take over control of the session, or even steal API keys.

The attack can be executed e.g. when you application injects the request parameter directly into the HTML code of the page returned to the user:

https://server.com/confirmation?message=Transaction+Complete

what results in:

<span>Confirmation: Transaction Complete</span>

In that case the message can be modified to become a valid Javascript code, e.g.:

https://server.com/confirmation?message=<script>dangerous javascript code here</script>

and it will be executed locally by the user's browser with full access to the user's personal application/browser data:

<span>Confirmation: <script>dangerous javascript code here</script></span>

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