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Vulnerability record · CVE-2021-26916 · published 8 February 2021

CVE-2021-26916: Nopcommerce cross-site scripting vulnerability

Nopcommerce · Nopcommerce

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.

6.1 CVSS 3.1 Medium EPSS 1.1% · top 35.2% CWE-79 · Cross-site scripting
6.1CVSS 3.1 base score, v2 4.3
1.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/nopSolutions/nopCommerce/issues/5322 ExploitThird Party Advisory
https://github.com/nopSolutions/nopCommerce/issues/5322 ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.1CVE-2019-19683Nopcommerce path traversal vulnerabilityRoxyFileman, as shipped with nopCommerce v4.2.0, is vulnerable to ../ path traversal via d or f to Admin/RoxyFileman/ProcessRequest because of Librar…EPSS 1.8%8.8CVE-2025-65593Nopcommerce cross-site request forgery vulnerabilitynopCommerce 4.90.0 is vulnerable to Cross Site Request Forgery (CSRF) via the Schedule Tasks functionality.EPSS 0.29%8.8CVE-2019-19685Nopcommerce cross-site request forgery vulnerabilityRoxyFileman, as shipped with nopCommerce v4.2.0, is vulnerable to CSRF because GET requests can be used for renames and deletions.EPSS 0.51%8.8CVE-2019-19684Nopcommerce unrestricted file upload vulnerabilitynopCommerce v4.2.0 allows privilege escalation via file upload in Presentation/Nop.Web/Admin/Areas/Controllers/PluginController.cs via Admin/Facebook…EPSS 1.6%7.5CVE-2022-33077Nopcommerce insecure direct object reference vulnerabilityAn access control issue in nopcommerce v4.50.2 allows attackers to arbitrarily modify any customer's address via the addressedit endpoint.EPSS 0.71%7.5CVE-2022-28451Nopcommerce path traversal vulnerabilitynopCommerce 4.50.1 is vulnerable to Directory Traversal via the backup file in the Maintenance feature.EPSS 1.6%7.1CVE-2025-11699Nopcommerce insufficient session expiration vulnerabilitynopCommerce v4.70 and prior, and version 4.80.3, does not invalidate session cookies after logout or session termination, allowing an attacker who ha…EPSS 0.43%6.1CVE-2025-65592Nopcommerce cross-site scripting vulnerabilitynopCommerce 4.90.0 is vulnerable to Cross Site Scripting (XSS) in the product management functionality. Malicious payloads inserted into the "Product…EPSS 0.26%

Source: NIST National Vulnerability Database (record CVE-2021-26916), CISA KEV, FIRST EPSS (scores of 2026-10-12). This page is refreshed as NVD updates the record.