Is CVE-2023-20873 in the CISA KEV catalog?

No. CVE-2023-20873 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-20873?

CVE-2023-20873 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2023-20873?

CVE-2023-20873 has an EPSS score of 1.12% (62th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-20873?

Upgrade spring boot to 3.0.6 or later.

CVE & CISA-KEV Catalog

CVE-2023-20873

CRITICAL

9.8

CVSS v3

NVD

Description

In Spring Boot versions 3.0.0 - 3.0.5, 2.7.0 - 2.7.10, and older unsupported versions, an application that is deployed to Cloud Foundry could be susceptible to a security bypass. Users of affected versions should apply the following mitigation: 3.0.x users should upgrade to 3.0.6+. 2.7.x users should upgrade to 2.7.11+. Users of older, unsupported versions should upgrade to 3.0.6+ or 2.7.11+.

How to fix

Remediation Available

spring bootNVD

Affected:>= 3.0.0, < 3.0.6Fixed in:3.0.6CVE-2023-20873derived 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

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

1.12%probability of exploitation in 30 days

62ndpercentile

Moderate risk: more likely to be exploited than 62% of all known CVEs.

References

Vendor Advisory1

spring.io

Third-Party Advisory1

security.netapp.com

Other references1

spring.io

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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 2025-05-05.