How severe is CVE-2020-8427?

CVE-2020-8427 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-8427 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (71st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-8427?

CVE-2020-8427 affects Unitrends Backup. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-8427?

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-2020-8427 published?

CVE-2020-8427 was published on 2020-02-17 and last updated on 2026-06-17.

CVE-2020-8427

CVE-2020-8427 is a critical-severity vulnerability in Unitrends Backup with a CVSS 3.x base score of 9.8. 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-89.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (71st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-89
Affected product: Unitrends Backup
Published: 2020-02-17
Last modified: 2026-06-17

Description

In Unitrends Backup before 10.4.1, an HTTP request parameter was not properly sanitized, allowing for SQL injection that resulted in an authentication bypass.

Frequently asked questions

What is CVE-2020-8427?: In Unitrends Backup before 10.4.1, an HTTP request parameter was not properly sanitized, allowing for SQL injection that resulted in an authentication bypass.
How severe is CVE-2020-8427?: CVE-2020-8427 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-8427 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-8427?: CVE-2020-8427 affects Unitrends Backup. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-8427?: 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-2020-8427 published?: CVE-2020-8427 was published on 2020-02-17 and last updated on 2026-06-17.

References

https://support.unitrends.com/UnitrendsBackup/s/article/000006983

Affected products (1)

cpe:2.3:a:unitrends:backup:*:*:*:*:*:*:*:*

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