CVE-2020-19003: An issue in Gate One 1.2.0 allows attackers to bypass to the verification check done by the origins list and c

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MEDIUM 5.3REMOTEDOWNGRADE

CVE-2020-19003 is a medium-severity flaw (CVSS 5.3) affecting gate one. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue in Gate One 1.2.0 allows attackers to bypass to the verification check done by the origins list and connect to Gate One instances used by hosts not on the origins list.

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.8% (top 44%)
CISA exploited list	No
Weakness	CWE-290
Published	2021-10-06
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: liftoffsoftware

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

Am I affected?

Timeline

2021-10-06 13:15 UTCPublished CVE record published
2026-06-17 02:59 UTCUpdated Record last modified

liftoffsoftware gate one DOWNGRADE

Affected: 1.2.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.2.0

1. Check installed version

apt-cache policy gate-one || rpm -q gate-one || gate-one --version

2. No fixed release: DOWNGRADE to a release before 1.2.0 (Debian / Ubuntu)

apt-cache madison gate-one sudo apt install gate-one=<VERSION_BEFORE_1.2.0> sudo apt-mark hold gate-one

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list gate-one sudo dnf downgrade gate-one-<VERSION_BEFORE_1.2.0> sudo dnf versionlock add gate-one

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2020-19003?

gate one: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-19003 being exploited?

CVE-2020-19003 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-2020-19003 affect?

CVE-2020-19003 affects gate one. Severity is medium (CVSS 5.3). An issue in Gate One 1.2.0 allows attackers to bypass to the verification check done by the origins list and connect to Gate One instances used by hosts not on the origins list.

How urgent is CVE-2020-19003?

Priority 43/100. Public exploit reference; Remotely exploitable, no login, no user action

References

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