How severe is CVE-2021-21029?

CVE-2021-21029 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-21029 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 85% (100th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-21029?

CVE-2021-21029 primarily affects Magento. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-21029?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-21029 published?

CVE-2021-21029 was published on 2021-02-11 and last updated on 2026-06-17.

CVE-2021-21029

CVE-2021-21029 is a medium-severity vulnerability in Magento with a CVSS 3.x base score of 4.8. Its EPSS exploit-prediction score of 85% places it in the 100th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 4.8)
CVSS v2: 3.5
EPSS exploit prediction: 85% (100th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Magento
Published: 2021-02-11
Last modified: 2026-06-17

Description

Magento versions 2.4.1 (and earlier), 2.4.0-p1 (and earlier) and 2.3.6 (and earlier) are affected by a Reflected Cross-site Scripting vulnerability via 'file' parameter. Successful exploitation could lead to arbitrary JavaScript execution in the victim's browser. Access to the admin console is required for successful exploitation.

Frequently asked questions

What is CVE-2021-21029?: Magento versions 2.4.1 (and earlier), 2.4.0-p1 (and earlier) and 2.3.6 (and earlier) are affected by a Reflected Cross-site Scripting vulnerability via 'file' parameter. Successful exploitation could lead to arbitrary JavaScript execution in the victim's browser. Access to the admin console is required for successful exploitation.
How severe is CVE-2021-21029?: CVE-2021-21029 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-21029 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 85% (100th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-21029?: CVE-2021-21029 primarily affects Magento. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-21029?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-21029 published?: CVE-2021-21029 was published on 2021-02-11 and last updated on 2026-06-17.

References

https://helpx.adobe.com/security/products/magento/apsb21-08.html

Affected products (10)

cpe:2.3:a:magento:magento:*:*:*:*:commerce:*:*:*
cpe:2.3:a:magento:magento:*:*:*:*:open_source:*:*:*
cpe:2.3:a:magento:magento:2.3.6:-:*:*:commerce:*:*:*
cpe:2.3:a:magento:magento:2.3.6:-:*:*:open_source:*:*:*
cpe:2.3:a:magento:magento:2.4.0:-:*:*:commerce:*:*:*
cpe:2.3:a:magento:magento:2.4.0:-:*:*:open_source:*:*:*
cpe:2.3:a:magento:magento:2.4.0:p1:*:*:commerce:*:*:*
cpe:2.3:a:magento:magento:2.4.0:p1:*:*:open_source:*:*:*
cpe:2.3:a:magento:magento:2.4.1:-:*:*:commerce:*:*:*
cpe:2.3:a:magento:magento:2.4.1:-:*:*:open_source:*:*:*

More vulnerabilities in Magento

CVE-2020-9664 — Critical (CVSS 9.8): Magento versions 1.14.4.5 and earlier, and 1.9.4.5 and earlier have a php object injection vulnerability. Successful…
CVE-2020-9632 — Critical (CVSS 9.8): Magento versions 2.3.4 and earlier, 2.2.11 and earlier (see note), 1.14.4.4 and earlier, and 1.9.4.4 and earlier have a…
CVE-2020-9631 — Critical (CVSS 9.8): Magento versions 2.3.4 and earlier, 2.2.11 and earlier (see note), 1.14.4.4 and earlier, and 1.9.4.4 and earlier have a…
CVE-2020-9630 — Critical (CVSS 9.8): Magento versions 2.3.4 and earlier, 2.2.11 and earlier (see note), 1.14.4.4 and earlier, and 1.9.4.4 and earlier have a…
CVE-2020-9585 — Critical (CVSS 9.8): Magento versions 2.3.4 and earlier, 2.2.11 and earlier (see note), 1.14.4.4 and earlier, and 1.9.4.4 and earlier have a…
CVE-2020-9583 — Critical (CVSS 9.8): Magento versions 2.3.4 and earlier, 2.2.11 and earlier (see note), 1.14.4.4 and earlier, and 1.9.4.4 and earlier have a…

All CVEs affecting Magento →

Other CWE-79 (Cross-site Scripting (XSS)) vulnerabilities

CVE-2025-49410 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Imran Emu TC…
CVE-2024-47875 — Critical (CVSS 10.0): DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMpurify was vulnerable to…
CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
CVE-2023-45144 — Critical (CVSS 10.0): com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on…
CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…

Browse all CWE-79 (Cross-site Scripting (XSS)) vulnerabilities →