Is CVE-2020-15840 in the CISA KEV catalog?

No. CVE-2020-15840 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-15840?

CVE-2020-15840 has a CVSS v3 base score of 5.3 (MEDIUM).

What is the EPSS score for CVE-2020-15840?

CVE-2020-15840 has an EPSS score of 1.05% (60th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-15840?

Upgrade liferay portal to 7.3.1 or later.

CVE & CISA-KEV Catalog

CVE-2020-15840

MEDIUM

5.3

CVSS v3

NVD

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.

How to fix

Remediation Available

liferay portalNVD

Affected:< 7.3.1Fixed in:7.3.1CVE-2020-15840derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

1.05%probability of exploitation in 30 days

60thpercentile

Moderate risk: more likely to be exploited than 60% of all known CVEs.

References

Vendor Advisory3

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Markdown

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HTML

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-05-13.