CVE-2021-42193: nopCommerce 4.40.3 is vulnerable to XSS in the Product Name at /Admin/Product/Edit/[id]

Routine

MEDIUM 6.1DOWNGRADE

CVE-2021-42193 is a medium-severity flaw (CVSS 6.1) affecting nopcommerce. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 86%)
CISA exploited list	No
Weakness	CWE-79
Published	2025-10-03
Last modified	2026-07-05

Publisher (CNA): MITRE · Vendor: nopcommerce

Last updated 2026-07-05 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-10-03 17:15 UTCPublished CVE record published
2026-07-05 17:17 UTCUpdated Record last modified

nopcommerce nopcommerce DOWNGRADE

Affected: 4.40.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.40.3

1. Check installed version

apt-cache policy nopcommerce || rpm -q nopcommerce || nopcommerce --version

2. No fixed release: DOWNGRADE to a release before 4.40.3 (Debian / Ubuntu)

apt-cache madison nopcommerce sudo apt install nopcommerce=<VERSION_BEFORE_4.40.3> sudo apt-mark hold nopcommerce

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list nopcommerce sudo dnf downgrade nopcommerce-<VERSION_BEFORE_4.40.3> sudo dnf versionlock add nopcommerce

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-42193?

nopcommerce: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-42193 being exploited?

CVE-2021-42193 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-42193 affect?

CVE-2021-42193 affects nopcommerce. Severity is medium (CVSS 6.1). 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.

How urgent is CVE-2021-42193?

Priority 30/100. Public exploit reference

Related CVEs

CVE-2025-65593 HIGH 8.8 DOWNGRADE nopCommerce 4.90.0 is vulnerable to Cross Site Request Forgery (CSRF) via the Schedule Tasks functionality.
CVE-2025-65589 MEDIUM 6.1 DOWNGRADE nopCommerce 4.90.0 is vulnerable to Cross Site Scripting (XSS) via the Attributes functionality.
CVE-2025-65592 MEDIUM 6.1 DOWNGRADE nopCommerce 4.90.0 is vulnerable to Cross Site Scripting (XSS) in the product management functionality
CVE-2025-65591 MEDIUM 5.4 DOWNGRADE nopCommerce 4.90.0 is vulnerable to Cross Site Scripting (XSS) via the Currencies functionality.
CVE-2025-65590 MEDIUM 5.4 DOWNGRADE nopCommerce 4.90.0 is vulnerable to Cross Site Scripting (XSS) via the Blog posts functionality in the Content

References

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