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.

Cross Site Request Forgery (CSRF) in CART option in OpenCart Ltd. Opencart CMS 3.0.3.6 allows attacker to add cart items via Add to cart.

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.

OpenCart 3.0.3.2 allows remote authenticated users to conduct XSS attacks via a crafted filename in the users' image upload section.

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.

/upload/catalog/controller/account/password.php in OpenCart through 3.0.2.0 has CSRF via the index.php?route=account/password URI to change a user's password.

OpenCart through 3.0.2.0 allows directory traversal in the editDownload function in admin\model\catalog\download.php via admin/index.php?route=catalog/download/edit, related to the download_id. For example, an attacker can download ../../config.php.

The "program extension upload" feature in OpenCart through 3.0.2.0 has a six-step process (upload, install, unzip, move, xml, remove) that allows attackers to execute arbitrary code if the remove step is skipped, because the attacker can discover a secret temporary directory name (containing 10 random digits) via a directory traversal attack involving language_info['code'].

The Cart::getProducts method in system/library/cart.php in OpenCart 1.5.6.4 and earlier allows remote attackers to conduct server-side request forgery (SSRF) attacks or possibly conduct XML External Entity (XXE) attacks and execute arbitrary code via a crafted serialized PHP object, related to the quantity parameter in an update request.

In OpenCart 1.4.7 to 1.5.5.1, implemented anti-traversal code in filemanager.php is ineffective and can be bypassed.