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CVE-2019-16891

58
FAUCET Score

CVE-2019-16891 is a critical deserialization vulnerability in Liferay Portal CE 6.2.5 that allows for remote command execution. With a CVSS score of 9.8, this flaw can be exploited remotely without authentication or user interaction, leading to complete compromise of confidentiality, integrity, and availability. While there are no known public exploits or active exploitation, the vulnerability has garnered significant community discussion, indicating potential interest. Its high FAUCET Risk Score and EPSS percentile suggest a substantial threat despite the lack of confirmed exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
<= 6.0.6CPE matchmatch criteria
cpe:2.3:a:liferay:liferay_portal:*:*:*:*:community:*:*:*
6.1.0CPE matchmatch criteria
cpe:2.3:a:liferay:liferay_portal:6.1.0:b1:*:*:community:*:*:*
6.1.0CPE matchmatch criteria
cpe:2.3:a:liferay:liferay_portal:6.1.0:b2:*:*:community:*:*:*
6.1.0CPE matchmatch criteria
cpe:2.3:a:liferay:liferay_portal:6.1.0:b3:*:*:community:*:*:*
6.1.0CPE matchmatch criteria
cpe:2.3:a:liferay:liferay_portal:6.1.0:b4:*:*:community:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
45.65%
Probability of exploitation in next 30 days
EPSS Percentile
98.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.4565 is in the 96th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

mavenpatch availablevia ghsa
Product: com.liferay.portal:release.portal.bomFixed in: 7.1.1

Vendor Advisories (1)

mavenGHSA-372h-p48h-xw8qcritical

Liferay Portal Allows RCE via Deserialization of a JSON Payload

May 24, 2022

References

dappsec.substack.com / p/an-advisory-for-cve-2019-16891-from
ExploitThird Party Advisory
sec.vnpt.vn / 2019/09/liferay-deserialization-json-deserialization-part-4
ExploitThird Party Advisory
liferay.com / downloads-community
ProductRelease Notes
youtube.com / watch
Exploit