How severe is CVE-2019-16891?

CVE-2019-16891 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-2019-16891 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 46% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-16891?

CVE-2019-16891 primarily affects Liferay Liferay Portal. In total, 75 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2019-16891?

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-2019-16891 published?

CVE-2019-16891 was published on 2019-10-04 and last updated on 2026-06-17.

CVE-2019-16891

CVE-2019-16891 is a critical-severity vulnerability in Liferay Liferay Portal with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 46% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-502.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 46% (99th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-502
Affected product: Liferay Liferay Portal
Published: 2019-10-04
Last modified: 2026-06-17

Description

Liferay Portal CE 6.2.5 allows remote command execution because of deserialization of a JSON payload.

Frequently asked questions

What is CVE-2019-16891?: Liferay Portal CE 6.2.5 allows remote command execution because of deserialization of a JSON payload.
How severe is CVE-2019-16891?: CVE-2019-16891 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-2019-16891 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 46% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-16891?: CVE-2019-16891 primarily affects Liferay Liferay Portal. In total, 75 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2019-16891?: 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-2019-16891 published?: CVE-2019-16891 was published on 2019-10-04 and last updated on 2026-06-17.

References

Affected products (75)

cpe:2.3:a:liferay:liferay_portal:*:*:*:*:community:*:*:*
cpe:2.3:a:liferay:liferay_portal:6.1.0:b1:*:*:community:*:*:*
cpe:2.3:a:liferay:liferay_portal:6.1.0:b2:*:*:community:*:*:*
cpe:2.3:a:liferay:liferay_portal:6.1.0:b3:*:*:community:*:*:*
cpe:2.3:a:liferay:liferay_portal:6.1.0:b4:*:*:community:*:*:*
cpe:2.3:a:liferay:liferay_portal:6.1.0:ga1:*:*:community:*:*:*
cpe:2.3:a:liferay:liferay_portal:6.1.0:rc1:*:*:community:*:*:*
cpe:2.3:a:liferay:liferay_portal:6.1.1:ga2:*:*:community:*:*:*
cpe:2.3:a:liferay:liferay_portal:6.1.2:ga3:*:*:community:*:*:*
cpe:2.3:a:liferay:liferay_portal:6.2.0:b1:*:*:community:*:*:*
cpe:2.3:a:liferay:liferay_portal:6.2.0:b2:*:*:community:*:*:*
cpe:2.3:a:liferay:liferay_portal:6.2.0:ga1:*:*:community:*:*:*
cpe:2.3:a:liferay:liferay_portal:6.2.0:m1:*:*:community:*:*:*
cpe:2.3:a:liferay:liferay_portal:6.2.0:m2:*:*:community:*:*:*
cpe:2.3:a:liferay:liferay_portal:6.2.0:m3:*:*:community:*:*:*
cpe:2.3:a:liferay:liferay_portal:6.2.0:m4:*:*:community:*:*:*
cpe:2.3:a:liferay:liferay_portal:6.2.0:m5:*:*:community:*:*:*
cpe:2.3:a:liferay:liferay_portal:6.2.0:m6:*:*:community:*:*:*
cpe:2.3:a:liferay:liferay_portal:6.2.0:rc1:*:*:community:*:*:*
cpe:2.3:a:liferay:liferay_portal:6.2.0:rc2:*:*:community:*:*:*
cpe:2.3:a:liferay:liferay_portal:6.2.0:rc3:*:*:community:*:*:*
cpe:2.3:a:liferay:liferay_portal:6.2.0:rc4:*:*:community:*:*:*
cpe:2.3:a:liferay:liferay_portal:6.2.0:rc5:*:*:community:*:*:*
cpe:2.3:a:liferay:liferay_portal:6.2.0:rc6:*:*:community:*:*:*
cpe:2.3:a:liferay:liferay_portal:6.2.1:ga2:*:*:community:*:*:*
cpe:2.3:a:liferay:liferay_portal:6.2.2:ga3:*:*:community:*:*:*
cpe:2.3:a:liferay:liferay_portal:6.2.3:ga4:*:*:community:*:*:*
cpe:2.3:a:liferay:liferay_portal:6.2.4:ga5:*:*:community:*:*:*
cpe:2.3:a:liferay:liferay_portal:6.2.5:ga6:*:*:community:*:*:*
cpe:2.3:a:liferay:liferay_portal:7.0.0:a1:*:*:community:*:*:*
cpe:2.3:a:liferay:liferay_portal:7.0.0:a2:*:*:community:*:*:*
cpe:2.3:a:liferay:liferay_portal:7.0.0:a3:*:*:community:*:*:*
cpe:2.3:a:liferay:liferay_portal:7.0.0:a4:*:*:community:*:*:*
cpe:2.3:a:liferay:liferay_portal:7.0.0:a5:*:*:community:*:*:*
cpe:2.3:a:liferay:liferay_portal:7.0.0:b1:*:*:community:*:*:*
cpe:2.3:a:liferay:liferay_portal:7.0.0:b2:*:*:community:*:*:*
cpe:2.3:a:liferay:liferay_portal:7.0.0:b3:*:*:community:*:*:*
cpe:2.3:a:liferay:liferay_portal:7.0.0:b4:*:*:community:*:*:*
cpe:2.3:a:liferay:liferay_portal:7.0.0:b5:*:*:community:*:*:*
cpe:2.3:a:liferay:liferay_portal:7.0.0:b6:*:*:community:*:*:*

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