CVE-2023-20883 Spring Boot Welcome Page Denial of Service
Attackers can cause denial of service in Spring Boot applications using Spring MVC with a reverse proxy cache.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-20883?
CVE-2023-20883 is a high-severity denial of service vulnerability in Spring Boot, published on 26 May 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-400
Which versions are affected by CVE-2023-20883?
8 open source packages ship an affected version, including org.springframework.boot:spring-boot-autoconfigure. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
org.springframework.boot:spring-boot-autoconfigure Maven | All versions | 2.5.15 |
org.springframework.boot:spring-boot-autoconfigure Maven | All versions | 2.5.15 |
org.springframework.boot:spring-boot-autoconfigure Maven | From 2.6.0 | 2.6.15 |
org.springframework.boot:spring-boot-autoconfigure Maven | From 2.6.0 | 2.6.15 |
org.springframework.boot:spring-boot-autoconfigure Maven | From 2.7.0 | 2.7.12 |
org.springframework.boot:spring-boot-autoconfigure Maven | From 2.7.0 | 2.7.12 |
2 more packages
org.springframework.boot:spring-boot-autoconfigure Maven | From 3.0.0 | 3.0.7 |
org.springframework.boot:spring-boot-autoconfigure Maven | From 3.0.0 | 3.0.7 |
Products include Vmware Spring Boot.
How do I fix CVE-2023-20883?
Upgrade org.springframework.boot:spring-boot-autoconfigure to a fixed version for your release line: 2.5.15, 2.6.15, 2.7.12 or 3.0.7.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2023-20883 being exploited?
There is no known exploitation of CVE-2023-20883 in the wild and no public exploit code.
Other vulnerabilities in Spring Boot
- CVE-2023-20873 Spring Boot Security Bypass with Wildcard Pattern Matching on Cloud Foundry
- CVE-2026-40976 Spring Boot's default security filter chain has no authorization rule with Actuator but without Health
- CVE-2026-22731 Authentication Bypass under Actuator Health groups paths
- CVE-2026-22733 Authentication Bypass under Actuator CloudFoundry endpoints
- CVE-2022-27772 Temporary Directory Hijacking to Local Privilege Escalation Vulnerability in org.springframework.boot:spring-boot
Sources
Also known as GHSA-xf96-w227-r7c4, ROOT-APP-MAVEN-CVE-2023-20883.