Libraries/Nop.Services/Localization/LocalizationService.cs in nopCommerce through 4.10 allows XXE via the "Configurations -> Languages -> Edit Language -> Import Resources -> Upload XML file" screen.

nopCommerce through 4.20 allows XSS in the SaveStoreMappings of the components \Presentation\Nop.Web\Areas\Admin\Controllers\NewsController.cs and \Presentation\Nop.Web\Areas\Admin\Controllers\BlogController.cs via Body or Full to Admin/News/NewsItemEdit/[id] Admin/Blog/BlogPostEdit/[id]. NOTE: the vendor reportedly considers this a "feature" because the affected components are an HTML content editor.

RoxyFileman, as shipped with nopCommerce v4.2.0, is vulnerable to ../ path traversal via d or f to Admin/RoxyFileman/ProcessRequest because of Libraries/Nop.Services/Media/RoxyFileman/FileRoxyFilemanService.cs.

nopCommerce v4.2.0 allows privilege escalation via file upload in Presentation/Nop.Web/Admin/Areas/Controllers/PluginController.cs via Admin/FacebookAuthentication/Configure because it is possible to upload a crafted Facebook Auth plugin.

RoxyFileman, as shipped with nopCommerce v4.2.0, is vulnerable to CSRF because GET requests can be used for renames and deletions.

nopCommerce Store 4.30 is affected by cross-site scripting (XSS) in the Schedule tasks name field. This vulnerability can allow an attacker to inject the XSS payload in Schedule tasks and each time any user will go to that page of the website, the XSS triggers and attacker can able to steal the cookie according to the crafted payload.

In nopCommerce 4.30, a Reflected XSS issue in the Discount Coupon component allows remote attackers to inject arbitrary web script or HTML through the Filters/CheckDiscountCouponAttribute.cs discountcode parameter.

nopCommerce 4.40.3 is vulnerable to XSS in the Product Name at /Admin/Product/Edit/[id]. Each time a user views the product in the shop, the XSS payload fires.

Multiple open redirect vulnerabilities in NopCommerce 4.10 through 4.50.1 allow remote attackers to conduct phishing attacks by redirecting users to attacker-controlled web sites via the returnUrl parameter, processed by the (1) ChangePassword function, (2) SignInCustomerAsync function, (3) SuccessfulAuthentication method, or (4) NopRedirectResultExecutor class.

In nopCommerce 4.50.1, an open redirect vulnerability can be triggered by luring a user to authenticate to a nopCommerce page by clicking on a crafted link.

nopCommerce 4.50.1 is vulnerable to Cross Site Scripting (XSS). An attacker (role customer) can inject javascript code to First name or Last name at Customer Info.

nopCommerce 4.50.1 is vulnerable to Cross Site Scripting (XSS). At Apply for vendor account feature, an attacker can upload an arbitrary file to the system.

nopCommerce 4.50.1 is vulnerable to Cross Site Scripting (XSS) via the "Text" parameter (forums) when creating a new post, which allows a remote attacker to execute arbitrary JavaScript code at client browser.

nopCommerce 4.50.1 is vulnerable to Directory Traversal via the backup file in the Maintenance feature.

An access control issue in nopcommerce v4.50.2 allows attackers to arbitrarily modify any customer's address via the addressedit endpoint.

Nopcommerce 4.70.1 is vulnerable to Cross Site Scripting (XSS) via the combined "AddProductReview.Title" and "AddProductReview.ReviewText" parameter(s) (Reviews) when creating a new review.

nopCommerce through 4.90.1 does not offer locking for order placement. Thus there is a race condition with duplicate redeeming of gift cards.

nopCommerce v4.70 and prior, and version 4.80.3, does not invalidate session cookies after logout or session termination, allowing an attacker who has a a valid session cookie access to privileged endpoints (such as /admin) even after the legitimate user has logged out, enabling session hijacking. Any version above 4.70 that is not 4.80.3 fixes the vulnerability.

nopCommerce 4.90.0 is vulnerable to Cross Site Scripting (XSS) via the Attributes functionality.

nopCommerce 4.90.0 is vulnerable to Cross Site Scripting (XSS) via the Blog posts functionality in the Content Management area.

nopCommerce 4.90.0 is vulnerable to Cross Site Scripting (XSS) via the Currencies functionality.

nopCommerce 4.90.0 is vulnerable to Cross Site Scripting (XSS) in the product management functionality. Malicious payloads inserted into the "Product Name" and "Short Description" fields are stored in the backend database and executed automatically whenever a user views the affected pages.

nopCommerce 4.90.0 is vulnerable to Cross Site Request Forgery (CSRF) via the Schedule Tasks functionality.