How severe is CVE-2020-20184?

CVE-2020-20184 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-2020-20184 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-20184?

CVE-2020-20184 affects Liftoffsoftware Gateone. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-20184?

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-2020-20184 published?

CVE-2020-20184 was published on 2020-12-14 and last updated on 2026-06-17.

CVE-2020-20184

CVE-2020-20184 is a critical-severity vulnerability in Liftoffsoftware Gateone 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-78.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 3% (84th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Liftoffsoftware Gateone
Published: 2020-12-14
Last modified: 2026-06-17

Description

GateOne allows remote attackers to execute arbitrary commands via shell metacharacters in the port field when attempting an SSH connection.

Frequently asked questions

What is CVE-2020-20184?: GateOne allows remote attackers to execute arbitrary commands via shell metacharacters in the port field when attempting an SSH connection.
How severe is CVE-2020-20184?: CVE-2020-20184 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-2020-20184 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-20184?: CVE-2020-20184 affects Liftoffsoftware Gateone. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-20184?: 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-2020-20184 published?: CVE-2020-20184 was published on 2020-12-14 and last updated on 2026-06-17.

References

https://github.com/liftoff/GateOne/issues/736

Affected products (1)

cpe:2.3:a:liftoffsoftware:gateone:-:*:*:*:*:*:*:*

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