CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
AI Score
Confidence
Low
EPSS
Percentile
9.0%
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.