What’s Vulnerable › Vulnerabilities

CVE-2022-4137: Keycloak: reflected xss attack

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-09-25 · updated 2026-06-17
• Weakness: CWE-81

Description

A reflected cross-site scripting (XSS) vulnerability was found in the 'oob' OAuth endpoint due to incorrect null-byte handling. This issue allows a malicious link to insert an arbitrary URI into a Keycloak error page. This flaw requires a user or administrator to interact with a link in order to be vulnerable. This may compromise user details, allowing it to be changed or collected by an attacker.

Affected products

• Keycloak: all versions
• Red Hat Single Sign-On: 7.6

References

• https://access.redhat.com/errata/RHSA-2023:1043
• https://access.redhat.com/errata/RHSA-2023:1044
• https://access.redhat.com/errata/RHSA-2023:1045
• https://access.redhat.com/errata/RHSA-2023:1049
• https://access.redhat.com/security/cve/CVE-2022-4137
• https://bugzilla.redhat.com/show_bug.cgi?id=2148496
• https://access.redhat.com/errata/RHSA-2023:1043
• https://access.redhat.com/errata/RHSA-2023:1044
• https://access.redhat.com/errata/RHSA-2023:1045
• https://access.redhat.com/errata/RHSA-2023:1049
• https://access.redhat.com/security/cve/CVE-2022-4137
• https://bugzilla.redhat.com/show_bug.cgi?id=2148496

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