CVE-2020-5407

Signature Wrapping Vulnerability with spring-security-saml2-service-provider

HIGH
8.8
CVSS Score
Published: May 13, 2020 at 05:00 PM UTC
Updated: June 17, 2026 at 03:21 AM UTC
2 products affected across 2 vendorsSpring SecuritySpring Security

Using Spring Security by Spring by VMware?

Get instant alerts when new vulnerabilities affect Spring Security - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Severity
HIGH8.8
Exploit prediction
EPSS 1%

Description

Spring Security versions 5.2.x prior to 5.2.4 and 5.3.x prior to 5.3.2 contain a signature wrapping vulnerability during SAML response validation. When using the spring-security-saml2-service-provider component, a malicious user can carefully modify an otherwise valid SAML response and append an arbitrary assertion that Spring Security will accept as valid.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

5.2.0 ≤ v < 5.2.45.3.0 ≤ v < 5.3.2
Affected range stops below 5.2.4, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.3.2, so it looks safe — our inference, not a vendor statement
5.2 ≤ v < 5.2.45.3 ≤ v < 5.3.25.25.3
Affected range stops below 5.2.4, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.3.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-347

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Free plan, no card