CVE-2020-15842

Severity: high (CVSS 8.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-07-20 · updated 2026-06-17
Weakness: CWE-502

Description

Liferay Portal before 7.3.0, and Liferay DXP 7.0 before fix pack 90, 7.1 before fix pack 17, and 7.2 before fix pack 5, allows man-in-the-middle attackers to execute arbitrary code via crafted serialized payloads, because of insecure deserialization.

Affected products

Liferay Digital Experience Platform: 7.0, 7.0-fix_pack_13, 7.0-fix_pack_14, 7.0-fix_pack_24, 7.0-fix_pack_25, 7.0-fix_pack_26 (+68)
Liferay Portal: before 7.3.0 — fixed in 7.3.0

How to fix

Upgrade to a fixed version: Liferay Portal 7.3.0. Check the vendor advisory for mitigations.

References

https://issues.liferay.com/browse/LPE-16963
https://portal.liferay.dev/learn/security/known-vulnerabilities/-/asset_publisher/HbL5mxmVrnXW/content/id/119317427
https://issues.liferay.com/browse/LPE-16963
https://portal.liferay.dev/learn/security/known-vulnerabilities/-/asset_publisher/HbL5mxmVrnXW/content/id/119317427

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