How severe is CVE-2021-21064?

CVE-2021-21064 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-21064 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (94th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-21064?

CVE-2021-21064 primarily affects Magento Upward Connector. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-21064?

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

When was CVE-2021-21064 published?

CVE-2021-21064 was published on 2021-02-25 and last updated on 2026-06-17.

CVE-2021-21064

CVE-2021-21064 is a medium-severity vulnerability in Magento Upward Connector with a CVSS 3.x base score of 4.9. 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-22.

Key facts

Severity: Medium (CVSS 3.x base score 4.9)
CVSS v2: 4.0
EPSS exploit prediction: 9% (94th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Magento Upward Connector
Published: 2021-02-25
Last modified: 2026-06-17

Description

Magento UPWARD-php version 1.1.4 (and earlier) is affected by a Path traversal vulnerability in Magento UPWARD Connector version 1.1.2 (and earlier) due to the upload feature. An attacker could potentially exploit this vulnerability to upload a malicious YAML file that can contain instructions which allows reading arbitrary files from the remote server. Access to the admin console is required for successful exploitation.

Frequently asked questions

What is CVE-2021-21064?: Magento UPWARD-php version 1.1.4 (and earlier) is affected by a Path traversal vulnerability in Magento UPWARD Connector version 1.1.2 (and earlier) due to the upload feature. An attacker could potentially exploit this vulnerability to upload a malicious YAML file that can contain instructions which allows reading arbitrary files from the remote server. Access to the admin console is required for successful exploitation.
How severe is CVE-2021-21064?: CVE-2021-21064 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-21064 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (94th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-21064?: CVE-2021-21064 primarily affects Magento Upward Connector. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-21064?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-21064 published?: CVE-2021-21064 was published on 2021-02-25 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:magento:upward_connector:*:*:*:*:*:*:*:*
cpe:2.3:a:magento:upward_php:*:*:*:*:*:*:*:*

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