CVE-2021-42193Public exploitNetwork attack vector

Stored XSS via unsanitized Product Name rendering

Published Oct 3, 2025 · Updated Oct 3, 2025

Stored XSS in nopCommerce 4.40.3 allows remote authenticated users to execute JavaScript via a crafted Product Name value. The Product Name editor at /Admin/Product/Edit/[id] accepts an obfuscated SVG onload handler and later renders it on storefront product pages without neutralizing the executable markup. Administrative product-edit access is required to plant the payload; JavaScript then runs in each visitor's browser under the storefront origin.

CVSS severity6.1
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in nopCommerce 4.40.3 allows remote authenticated users to execute JavaScript via a crafted Product Name value. The Product Name editor at /Admin/Product/Edit/[id] accepts an obfuscated SVG onload handler and later renders it on storefront product pages without neutralizing the executable markup. Administrative product-edit access is required to plant the payload; JavaScript then runs in each visitor's browser under the storefront origin.

The record

CVE
CVE-2021-42193
Published
Oct 3, 2025
Updated
Oct 3, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1059.007, T1203
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Oct 3, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 3, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript
T1203Exploitation for Client Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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