CVE-2023-6787
Keycloak Session Hijacking Vulnerability
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.
INFO
Published Date :
April 25, 2024, 4:15 p.m.
Last Modified :
June 30, 2025, 1:49 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.9
Exploitability Score :
2.8
Affected Products
The following products are affected by CVE-2023-6787
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2023-6787.
| URL | Resource |
|---|---|
| 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 | Vendor Advisory |
| https://bugzilla.redhat.com/show_bug.cgi?id=2254375 | Issue Tracking 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 | Vendor Advisory |
| https://bugzilla.redhat.com/show_bug.cgi?id=2254375 | Issue Tracking Vendor Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2023-6787 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2023-6787 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jun. 30, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Added CPE Configuration OR *cpe:2.3:a:redhat:build_of_keycloak:-:*:*:*:text-only:*:*:* *cpe:2.3:a:redhat:keycloak:*:*:*:*:*:*:*:* versions up to (excluding) 22.0.10 *cpe:2.3:a:redhat:keycloak:*:*:*:*:*:*:*:* versions from (including) 23.0.0 up to (excluding) 24.0.3 Added Reference Type CVE: https://access.redhat.com/errata/RHSA-2024:1867 Types: Vendor Advisory Added Reference Type Red Hat, Inc.: https://access.redhat.com/errata/RHSA-2024:1867 Types: Vendor Advisory Added Reference Type CVE: https://access.redhat.com/errata/RHSA-2024:1868 Types: Vendor Advisory Added Reference Type Red Hat, Inc.: https://access.redhat.com/errata/RHSA-2024:1868 Types: Vendor Advisory Added Reference Type CVE: https://access.redhat.com/security/cve/CVE-2023-6787 Types: Vendor Advisory Added Reference Type Red Hat, Inc.: https://access.redhat.com/security/cve/CVE-2023-6787 Types: Vendor Advisory Added Reference Type CVE: https://bugzilla.redhat.com/show_bug.cgi?id=2254375 Types: Issue Tracking, Vendor Advisory Added Reference Type Red Hat, Inc.: https://bugzilla.redhat.com/show_bug.cgi?id=2254375 Types: Issue Tracking, Vendor Advisory Added Reference Type Red Hat, Inc.: https://github.com/keycloak/keycloak/security/advisories/GHSA-c9h6-v78w-52wj Types: Vendor Advisory -
CVE Modified by [email protected]
Mar. 14, 2025
Action Type Old Value New Value Added Reference https://github.com/keycloak/keycloak/security/advisories/GHSA-c9h6-v78w-52wj -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://access.redhat.com/errata/RHSA-2024:1867 Added Reference https://access.redhat.com/errata/RHSA-2024:1868 Added Reference https://access.redhat.com/security/cve/CVE-2023-6787 Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=2254375 -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 03, 2024
Action Type Old Value New Value Added CWE CISA-ADP CWE-287 -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Received by [email protected]
Apr. 25, 2024
Action Type Old Value New Value Added 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. Added Reference Red Hat, Inc. https://access.redhat.com/errata/RHSA-2024:1867 [No types assigned] Added Reference Red Hat, Inc. https://access.redhat.com/errata/RHSA-2024:1868 [No types assigned] Added Reference Red Hat, Inc. https://access.redhat.com/security/cve/CVE-2023-6787 [No types assigned] Added Reference Red Hat, Inc. https://bugzilla.redhat.com/show_bug.cgi?id=2254375 [No types assigned] Added CWE Red Hat, Inc. CWE-287 Added CVSS V3.1 Red Hat, Inc. AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2023-6787 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2023-6787
weaknesses.