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Not in CISA KEV
HIGH severity

Liferay Portal and Liferay DXP have Insecure Deserialization VulnerabilityGHSA-mg3r-9jh8-33r9

HIGH

GHSA-mg3r-9jh8-33r9 is a high-severity (CVSS 8.1) Deserialization of Untrusted Data vulnerability in com.liferay.portal:release.portal.bom. A fix is available for com.liferay.portal:release.portal.bom — see the affected versions and patch details below.

Also known asCVE-2020-15842
Published
Updated
Affected
4 pkgs
Patched
4 / 4
Exploits
None indexed
Exploitation data as of Nov 5, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.8%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs78th percentile — riskier than 78% of all scored CVEsHighest risk
0.07%0.81%1.55%2.29%0.6%1.8%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

4 pkgs affected
☕com.liferay.portal:release.portal.bom☕com.liferay.portal:release.dxp.bom☕com.liferay.portal:release.dxp.bom☕com.liferay.portal:release.dxp.bom

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

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 Packages

4 total 4 fixed
EcosystemPackageVulnerable rangeFix
☕Mavencom.liferay.portal:release.portal.bomall versions7.3.0com.liferay.portal:release.portal.bom:7.3.0
☕Mavencom.liferay.portal:release.dxp.bom≥ 7.0.0&&< 7.0.10.fp907.0.10.fp90com.liferay.portal:release.dxp.bom:7.0.10.fp90
☕Mavencom.liferay.portal:release.dxp.bom≥ 7.1.0&&< 7.1.10.fp177.1.10.fp17com.liferay.portal:release.dxp.bom:7.1.10.fp17
☕Mavencom.liferay.portal:release.dxp.bom≥ 7.2.0&&< 7.2.10.fp57.2.10.fp5com.liferay.portal:release.dxp.bom:7.2.10.fp5

Affected Products

2 products · 75 configurations
Application
digital experience platformliferay
3 versions
7.07.17.2
Application
liferay portalliferay
< 7.3.0
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for com.liferay.portal:release.portal.bom, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update com.liferay.portal:release.portal.bom to 7.3.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-mg3r-9jh8-33r9 is resolved across your whole dependency graph.

  3. Workarounds

    Do not deserialise data from untrusted sources: where the format allows it, restrict deserialisation to an explicit allowlist of expected types, and prefer a data-only format (JSON, Protobuf) over one that can reconstruct arbitrary objects until you can upgrade.

Frequently Asked Questions

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.
O3 Security · Impact-Aware SCA

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Liferay Portal and Liferay DXP have Insecure…