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Fencer Vulns
high 7.5

CVE-2023-20883 json

Spring Boot Welcome Page Denial of Service

published 2023-05-26 3 y ago modified 2026-06-17 4 mo ago also GHSA-xf96-w227-r7c4 , EUVD-2023-1651

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 60%
public exploits
0
none known

Summary

In Spring Boot versions 3.0.0 - 3.0.6, 2.7.0 - 2.7.11, 2.6.0 - 2.6.14, 2.5.0 - 2.5.14 and older unsupported versions, there is potential for a denial-of-service (DoS) attack if Spring MVC is used together with a reverse proxy cache.

Patch / fix

  • maven org.springframework.boot:spring-boot-autoconfigure 2.5.15, 2.6.15, 2.7.12, 3.0.7
  • vmware spring_boot 2.5.14

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-20883 updated cvss 7.5

spring-boot: Spring Boot Welcome Page DoS Vulnerability

  • Red Hat Migration Toolkit for Runtimes spring-boot Red Hat Enterprise Linux 8 log4j, log4j-jcl, log4j-web, log4j-slf4j Red Hat Enterprise Linux 9 log4j, log4j-jcl, log4j-slf4j
    affected: no fix available
  • Red Hat JBoss Data Grid 7 spring-boot Red Hat JBoss Enterprise Application Platform 6 spring-boot Red Hat JBoss Fuse 6 spring-boot Red Hat JBoss Fuse Service Works 6 spring-boot
    affected: no fix planned “Out of support scope”
  • Red Hat support for Spring Boot spring-boot
    affected: no fix available
  • Red Hat build of OptaPlanner 8
    fixed: vendor fix RHSA-2023:4200
  • Red Hat Fuse 7.12
    fixed: vendor fix RHSA-2023:3954
  • Red Hat RHINT Camel-Springboot 3.18.3.P2
    fixed: vendor fix RHSA-2023:3641
  • Red Hat RHINT Camel-Springboot 3.20.1.P1
    fixed: vendor fix RHSA-2023:3740
  • Red Hat RHPAM 7.13.4 async
    fixed: vendor fix RHSA-2023:4983
show 1 more
  • Red Hat A-MQ Clients 2 spring-boot Red Hat AMQ Broker 7 spring-boot Red Hat Data Grid 8 spring-boot Red Hat Integration Camel K 1 spring-boot Red Hat JBoss Enterprise Application Platform 7 spring-boot Red Hat JBoss Enterprise Application Platform 8 spring-boot
    +4 more products
    Red Hat JBoss Enterprise Application Platform Expansion Pack spring-boot Red Hat OpenShift Application Runtimes spring-boot Red Hat Single Sign-On 7 spring-boot Red Hat streams for Apache Kafka spring-boot
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
21 mo ago

Exploit prediction

0.91% chance of exploitation in the next 30 days, higher than 60% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
maven org.springframework.boot:spring-boot-autoconfigure
>=3.0.0, <3.0.7
>=2.7.0, <2.7.12
>=2.6.0, <2.6.15
<2.5.15
3.0.7
2.7.12
2.6.15
2.5.15

Affected products

  • n/a Spring Boot

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.