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MEDIUM severity

CVE-2020-15839 — release.dxp.bom

MEDIUM

CVE-2020-15839 is a medium-severity (CVSS 6.5) Unrestricted File Upload vulnerability in com.liferay.portal:release.dxp.bom. A fix is available for com.liferay.portal:release.dxp.bom — see the affected versions and patch details below.

Unrestricted Upload of File with Dangerous Type in Liferay Portal and Liferay DXP

Also known asBIT-liferay-2020-15839GHSA-c7f6-4vx5-4263
Published
Updated
Affected
2 pkgs
Patched
2 / 2
Exploits
None indexed
Exploitation data as of Oct 10, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
2.2%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs82th percentile — riskier than 82% of all scored CVEsHighest risk
0.58%1.27%1.97%2.66%1.1%2.2%Apr 26Aug 26Oct 26

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

How urgent is this, really

CVE-2020-15839 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,738 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

2 pkgs affected
☕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 7.3.3, and Liferay DXP 7.1 before fix pack 18 and 7.2 before fix pack 6, does not restrict the size of a multipart/form-data POST action, which allows remote authenticated users to conduct denial-of-service attacks by uploading large files.

Affected Packages

2 total 2 fixed
EcosystemPackageVulnerable rangeFix
☕Mavencom.liferay.portal:release.dxp.bomall versions7.1.10.fp18com.liferay.portal:release.dxp.bom:7.1.10.fp18
☕Mavencom.liferay.portal:release.dxp.bom≥ 7.2.1&&< 7.2.10.fp67.2.10.fp6com.liferay.portal:release.dxp.bom:7.2.10.fp6

Affected Products

2 products · 26 configurations
Application
digital experience platformliferay
2 versions
7.17.2
Application
liferay portalliferay
< 7.3.3
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.dxp.bom, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update com.liferay.portal:release.dxp.bom to 7.1.10.fp18 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2020-15839 is resolved across your whole dependency graph.

  3. Workarounds

    Treat uploaded files as untrusted until proven otherwise: validate the actual content type rather than the supplied extension, store uploads outside the web root on a volume mounted without execute permission, and rename them to server-generated identifiers so an attacker cannot choose the path a request will later resolve.

Frequently Asked Questions

Liferay Portal before 7.3.3, and Liferay DXP 7.1 before fix pack 18 and 7.2 before fix pack 6, does not restrict the size of a multipart/form-data POST action, which allows remote authenticated users to conduct denial-of-service attacks by uploading large files.
O3 Security · Impact-Aware SCA

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CVE-2020-15839: release.dxp.bom — Fixed in 7.1.10.fp18