CVE-2023-6563
7.7 · HIGHOverview
CVE-2023-6563 is a high-severity vulnerability affecting redhat keycloak. It was published on December 14, 2023 and has a CVSS 3.1 base score of 7.7 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.7, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical Description
An unconstrained memory consumption vulnerability was discovered in Keycloak. It can be triggered in environments which have millions of offline tokens (> 500,000 users with each having at least 2 saved sessions). If an attacker creates two or more user sessions and then open the "consents" tab of the admin User Interface, the UI attempts to load a huge number of offline client sessions leading to excessive memory and CPU consumption which could potentially crash the entire system.
Remediation
Check the references section for vendor advisories and patches from redhat. Update keycloak to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| redhat | keycloak | >= 0, < 21.0.0 | Affected |
References
Frequently Asked Questions
What is CVE-2023-6563?
CVE-2023-6563 is a high-severity vulnerability affecting redhat keycloak. It was published on December 14, 2023 and has a CVSS 3.1 base score of 7.7 (HIGH).
How severe is CVE-2023-6563?
This vulnerability has a CVSS 3.1 base score of 7.7, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2023-6563?
Check the references section for vendor advisories and patches from redhat. Update keycloak to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2023-6563?
CyberStrike's AI-powered security agents can automatically detect CVE-2023-6563 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
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Browser-based exploitation validates findings with real proof-of-concept.
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