How severe is CVE-2021-42776?

CVE-2021-42776 has a CVSS 3.x base score of 7.7, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-42776 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-42776?

CVE-2021-42776 primarily affects Cloverdx. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-42776?

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-2021-42776 published?

CVE-2021-42776 was published on 2021-12-01 and last updated on 2026-06-17.

CVE-2021-42776

CVE-2021-42776 is a high-severity vulnerability in Cloverdx with a CVSS 3.x base score of 7.7. 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-611.

Key facts

Severity: High (CVSS 3.x base score 7.7)
CVSS v2: 6.8
EPSS exploit prediction: 1% (51st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-611
Affected product: Cloverdx
Published: 2021-12-01
Last modified: 2026-06-17

Description

CloverDX Server before 5.11.2 and and 5.12.x before 5.12.1 allows XXE during configuration import.

Frequently asked questions

What is CVE-2021-42776?: CloverDX Server before 5.11.2 and and 5.12.x before 5.12.1 allows XXE during configuration import.
How severe is CVE-2021-42776?: CVE-2021-42776 has a CVSS 3.x base score of 7.7, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-42776 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-42776?: CVE-2021-42776 primarily affects Cloverdx. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-42776?: 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-2021-42776 published?: CVE-2021-42776 was published on 2021-12-01 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:cloverdx:cloverdx:*:*:*:*:*:*:*:*
cpe:2.3:a:cloverdx:cloverdx:5.12.0:*:*:*:*:*:*:*
cpe:2.3:a:cloverdx:cloverdx:5.12.1:*:*:*:*:*:*:*

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