CVE-2023-6787

moderate-risk
Published 2024-04-25

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.

Do I need to act?

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0.42% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
6
CVSS 6.5/10 Medium
NETWORK / LOW complexity

Affected Products (2)

Affected Vendors

Redhat

References (9)

Vendor Advisory https://access.redhat.com/errata/RHSA-2024:1867
Vendor Advisory https://access.redhat.com/errata/RHSA-2024:1868
Vendor Advisory https://access.redhat.com/security/cve/CVE-2023-6787
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=2254375
Vendor Advisory https://github.com/keycloak/keycloak/security/advisories/GHSA-c9h6-v78w-52wj
Vendor Advisory https://access.redhat.com/errata/RHSA-2024:1867
Vendor Advisory https://access.redhat.com/errata/RHSA-2024:1868
Vendor Advisory https://access.redhat.com/security/cve/CVE-2023-6787
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=2254375
33
/ 100
moderate-risk
Severity 24/34 · High
Exploitability 2/34 · Minimal
Exposure 7/34 · Low