What’s Vulnerable › Vulnerabilities

CVE-2020-15840

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-09-24 · updated 2026-06-17

Description

In Liferay Portal before 7.3.1, Liferay Portal 6.2 EE, and Liferay DXP 7.2, DXP 7.1 and DXP 7.0, the property 'portlet.resource.id.banned.paths.regexp' can be bypassed with doubled encoded URLs.

Affected products

• Liferay Digital Experience Platform: 7.0, 7.1, 7.2
• Liferay Portal: before 7.3.1; 6.2 — fixed in 7.3.1

How to fix

Upgrade to a fixed version: Liferay Portal 7.3.1. Check the vendor advisory for mitigations.

References

• https://issues.liferay.com/browse/LPE-17046
• https://portal.liferay.dev/learn/security/known-vulnerabilities
• https://portal.liferay.dev/learn/security/known-vulnerabilities/-/asset_publisher/HbL5mxmVrnXW/content/id/119772204
• https://issues.liferay.com/browse/LPE-17046
• https://portal.liferay.dev/learn/security/known-vulnerabilities
• https://portal.liferay.dev/learn/security/known-vulnerabilities/-/asset_publisher/HbL5mxmVrnXW/content/id/119772204

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