How severe is CVE-2021-36042?

CVE-2021-36042 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-36042 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-36042?

CVE-2021-36042 primarily affects Adobe Adobe Commerce. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-36042?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2021-36042 published?

CVE-2021-36042 was published on 2021-09-01 and last updated on 2026-06-17.

CVE-2021-36042

CVE-2021-36042 is a critical-severity vulnerability in Adobe Adobe Commerce with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
CVSS v2: 6.5
EPSS exploit prediction: 2% (83rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Adobe Adobe Commerce
Published: 2021-09-01
Last modified: 2026-06-17

Description

Magento Commerce versions 2.4.2 (and earlier), 2.4.2-p1 (and earlier) and 2.3.7 (and earlier) are affected by an improper input validation vulnerability in the API File Option Upload Extension. An attacker with Admin privileges can achieve unrestricted file upload which can result in remote code execution.

Frequently asked questions

What is CVE-2021-36042?: Magento Commerce versions 2.4.2 (and earlier), 2.4.2-p1 (and earlier) and 2.3.7 (and earlier) are affected by an improper input validation vulnerability in the API File Option Upload Extension. An attacker with Admin privileges can achieve unrestricted file upload which can result in remote code execution.
How severe is CVE-2021-36042?: CVE-2021-36042 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-36042 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-36042?: CVE-2021-36042 primarily affects Adobe Adobe Commerce. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-36042?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-36042 published?: CVE-2021-36042 was published on 2021-09-01 and last updated on 2026-06-17.

References

https://helpx.adobe.com/security/products/magento/apsb21-64.html

Affected products (4)

cpe:2.3:a:adobe:adobe_commerce:*:*:*:*:*:*:*:*
cpe:2.3:a:adobe:adobe_commerce:2.4.2:p1:*:*:*:*:*:*
cpe:2.3:a:adobe:magento_open_source:*:*:*:*:*:*:*:*
cpe:2.3:a:adobe:magento_open_source:2.4.2:p1:*:*:*:*:*:*

More vulnerabilities in Adobe Adobe Commerce

CVE-2021-36041 — Critical (CVSS 9.1): Magento Commerce versions 2.4.2 (and earlier), 2.4.2-p1 (and earlier) and 2.3.7 (and earlier) are affected by an…
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