How severe is CVE-2021-36021?

CVE-2021-36021 has a CVSS 3.x base score of 7.2, rated high 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-2021-36021 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-36021?

CVE-2021-36021 primarily affects Magento. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-36021?

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

When was CVE-2021-36021 published?

CVE-2021-36021 was published on 2023-09-06 and last updated on 2026-06-17.

CVE-2021-36021

CVE-2021-36021 is a high-severity vulnerability in Magento with a CVSS 3.x base score of 7.2. 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: High (CVSS 3.x base score 7.2)
EPSS exploit prediction: 2% (78th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Magento
Published: 2023-09-06
Last modified: 2026-06-17

Description

Magento 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 within the CMS page scheduled update feature. An authenticated attacker with administrative privilege could leverage this vulnerability to achieve remote code execution on the system.

Frequently asked questions

What is CVE-2021-36021?: Magento 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 within the CMS page scheduled update feature. An authenticated attacker with administrative privilege could leverage this vulnerability to achieve remote code execution on the system.
How severe is CVE-2021-36021?: CVE-2021-36021 has a CVSS 3.x base score of 7.2, rated high 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-2021-36021 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-36021?: CVE-2021-36021 primarily affects Magento. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-36021?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-36021 published?: CVE-2021-36021 was published on 2023-09-06 and last updated on 2026-06-17.

References

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

Affected products (8)

cpe:2.3:a:magento:magento:*:*:*:*:commerce:*:*:*
cpe:2.3:a:magento:magento:*:*:*:*:open_source:*:*:*
cpe:2.3:a:magento:magento:2.3.7:-:*:*:commerce:*:*:*
cpe:2.3:a:magento:magento:2.3.7:-:*:*:open_source:*:*:*
cpe:2.3:a:magento:magento:2.4.2:-:*:*:commerce:*:*:*
cpe:2.3:a:magento:magento:2.4.2:-:*:*:open_source:*:*:*
cpe:2.3:a:magento:magento:2.4.2:p1:*:*:commerce:*:*:*
cpe:2.3:a:magento:magento:2.4.2:p1:*:*:open_source:*:*:*

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