CVE-2020-19003
Verification check bypass in Gate One
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2020-19003- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:P/A:N - Weakness
- CWE-290
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2020-19003- Updated
- 2026-11-02
EUVDEUVD-2021-0090 No score
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.
- Record
EUVD-2021-0090- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-q6j2-g8qf-wvf7
Verification check bypass in Gate One
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.
- Record
GHSA-q6j2-g8qf-wvf7- CVSS 4.0
- 6.9 Medium
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N - CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-290
- Updated
- 2026-11-02
OSVGHSA-q6j2-g8qf-wvf7
Verification check bypass in Gate One
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.
- Record
GHSA-q6j2-g8qf-wvf7- CVSS 4.0
- 6.9 Medium
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N - CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-290
- Updated
- 2026-11-02
OSVPYSEC-2021-423 No score
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.
- Record
PYSEC-2021-423- Updated
- 2026-11-02
Affected products
Affected packages
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-19003 is a medium vulnerability (CVSS 5.3) in Liftoffsoftware Gate One, published October 6, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.79%, the 56th percentile. No source names a fixed version.