CVE-2020-8427: In Unitrends Backup before 10.4.1, an HTTP request parameter was not properly sanitized, allowing for SQL inje

Q: How do I fix CVE-2020-8427?

backup: upgrade to 10.4.1. Exact commands for each OS are on this page.

Q: Is CVE-2020-8427 being exploited?

CVE-2020-8427 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2020-8427 affect?

CVE-2020-8427 affects backup. Severity is critical (CVSS 9.8). 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.

Q: How urgent is CVE-2020-8427?

Priority 58/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 9.8REMOTEUPGRADE

CVE-2020-8427 is a critical-severity flaw (CVSS 9.8) affecting backup. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.5% (top 26%)
CISA exploited list	No
Weakness	CWE-89
Published	2020-02-17
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: unitrends

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-02-17 15:15 UTCPublished CVE record published
2026-06-17 03:26 UTCUpdated Record last modified

unitrends backup UPGRADE

Affected: < 10.4.1

Fixed in: 10.4.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy backup || rpm -q backup || backup --version

2. UPGRADE to 10.4.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade backup

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade backup

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-8427?

backup: upgrade to 10.4.1. Exact commands for each OS are on this page.

Is CVE-2020-8427 being exploited?

CVE-2020-8427 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-8427 affect?

CVE-2020-8427 affects backup. Severity is critical (CVSS 9.8). 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 urgent is CVE-2020-8427?

Priority 58/100. Critical severity; Remotely exploitable, no login, no user action

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References

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