CVE Tools
Sign in

CVE-2023-6787

Keycloak: session hijacking via re-authentication

Published: Apr 25, 2024Updated: Jun 30, 2025 Sources: CVE List NVD GHSA BDUCWE-287
NVD MITRE
6.5CVSSMEDIUM
EPSS Score
0.7%
Top 50.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:RS:UC:NI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:HIntegrity
High
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-287

Affected Products

Red Hat Single Sign-OnRed Hat Inc.
On-prem
Operating Systems / linux-distro
Red Hat Build of KeycloakRed Hat Inc.
On-prem
Operating Systems / linux-distro
Red Hat build of Keycloak 22Red Hat
On-prem
Operating Systems / linux-distro
Red Hat build of Keycloak 22.0.10Red Hat
On-prem
Operating Systems / linux-distro
red hat inc.commercialUSOperating Systemsaka red hat
red hatcommercialUSOperating Systemsaka red hat
and 4 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Initial Access
View detailed technique mapping

References

https://access.redhat.com/security/cve/cve-2023-6787
access.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2254375
bugzilla.redhat.com
https://security.snyk.io/vuln/SNYK-JAVA-ORGKEYCLOAK-6291711
security.snyk.io
and 10 more references View all →

Timeline

Published
Apr 25, 2024
Last Updated
Jun 30, 2025

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2023-6787 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows