Improper Authentication in Spring Authorization Server
Spring Authorization Server versions 1.0.0 - 1.0.5, 1.1.0 - 1.1.5, 1.2.0 - 1.2.2 and older unsupported versions are susceptible to a PKCE Downgrade Attack for Confidential Clients.
Specifically, an application is vulnerable when a Confidential Client uses PKCE for the Authorization Code Grant.
An application is not vulnerable when a Public Client uses PKCE for the Authorization Code Grant.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | org.springframework.security:spring-security-oauth2-authorization-server | < 1.1.6, >= 1.2.0, < 1.2.3 | 1.1.6, 1.2.3 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N- Weakness (CWE)
CWE-287, CWE-470- Platform
- Java / Kotlin (Maven)
- Package
org.springframework.security:spring-security-oauth2-authorization-server- Disclosed
- 20.03.2024
- Updated
- 11.10.2026 12:21
Sources and licenses
OSV / GitHub Advisory Database - GHSA-x637-x8p3-5p22 - CC BY 4.0
Vulnerability history: org.springframework.security:spring-security-oauth2-authorization-server
All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 2
- First → latest
- 03.2024 06.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Medium 2
Disclosures per year
- 2024: 1
- 2025: 0
- 2026: 1
-
Improper Authentication in Spring Authorization Server this entry
Know which vulnerabilities affect your application
With the DockRay integration and software inventory enabled, DockRay checks reported component versions against known vulnerabilities and notifies you about confirmed matches. Coverage depends on the supported technology and available advisory data.