CVE-2021-21030

Magento vulnerability

CVSS

8.1

EPSS

5.6%

EPSS pct

92th

Exploited

No known

Magento versions 2.4.1 (and earlier), 2.4.0-p1 (and earlier) and 2.3.6 (and earlier) are vulnerable to a stored cross-site scripting (XSS) in the customer address upload feature. Successful exploitation could lead to arbitrary JavaScript execution in the victim's browser. Exploitation of this issue requires user interaction.

Affected vendor

Magento

Affected product

Magento

CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Weakness type (CWE)

CWE-79 — Cross-Site Scripting (XSS)

Published

2021-02-11

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, user interaction. Successful exploitation leads to high impact to confidentiality, high impact to integrity.

Its EPSS score of 5.6% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 92% of all scored CVEs.

Check your external exposure to CVE-2021-21030

Confirm whether Magento Magento is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2021-21030.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2021-21030

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2021-21030 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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