CVE-2023-6787
Keycloak: session hijacking via re-authentication
CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
0th
A flaw was found in Keycloak that occurs from an error in the re-authentication mechanism within org.keycloak.authentication. This flaw allows hijacking an active Keycloak session by triggering a new authentication process with the query parameter "prompt=login," prompting the user to re-enter their credentials. If the user cancels this re-authentication by selecting "Restart login," an account takeover may occur, as the new session, with a different SUB, will possess the same SID as the previous session.
| CWE | CWE-287 |
| Published | Apr 25, 2024 |
| Last Updated | Nov 11, 2025 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None
Affected Versions
Red Hat / Red Hat build of Keycloak 22
All versions affected Red Hat / Red Hat build of Keycloak 22
All versions affected Red Hat / Red Hat build of Keycloak 22
All versions affected Red Hat / Red Hat build of Keycloak 22.0.10
All versions affected Red Hat / Red Hat Single Sign-On 7
All versions affected References
access.redhat.com: https://access.redhat.com/errata/RHSA-2024:1867 access.redhat.com: https://access.redhat.com/errata/RHSA-2024:1868 access.redhat.com: https://access.redhat.com/security/cve/CVE-2023-6787 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2254375 github.com: https://github.com/keycloak/keycloak/security/advisories/GHSA-c9h6-v78w-52wj