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Keycloak vulnerable to reflected XSS via wildcard in OIDC redirect_uri

Moderate severity GitHub Reviewed Published Dec 18, 2023 in keycloak/keycloak • Updated Dec 18, 2023

Package

maven org.keycloak:keycloak-services (Maven)

Affected versions

< 23.0.3

Patched versions

23.0.3

Description

Keycloak prevents certain schemes in redirects, but permits them if a wildcard is appended to the token. This could permit an attacker to submit a specially crafted request leading to XSS or possibly further attacks.

References

@abstractj abstractj published to keycloak/keycloak Dec 18, 2023
Published to the GitHub Advisory Database Dec 18, 2023
Reviewed Dec 18, 2023
Last updated Dec 18, 2023

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N

EPSS score

0.114%
(46th percentile)

Weaknesses

CVE ID

CVE-2023-6134

GHSA ID

GHSA-cvg2-7c3j-g36j

Source code

Credits

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