Cyber Resilience

CVE-2023-6291

Open Redirect in Redhat Single Sign-On 7.6

Open Redirect
Published
26 January 2024
Modified
21 November 2024
Patch / advisory
View advisory
CVSS Score v3.1 7.1
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
EPSS Score 0.0095 58th percentile
Risk Priority 54 floored blend · peak EPSS

Summary

CVE-2023-6291 is a high-severity Open Redirect (CWE-601) vulnerability in Redhat Enterprise Linux. Its CVSS base score is 7.1 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Phishing (T1566); ranked in the top 42% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to SI-10 (Information Input Validation) and AC-4 (Information Flow Enforcement) — see the control section below for these in your framework.

OWASP Top 10 for Web (2025)

A01:2025 Broken Access Control

EU & UK References

Vulnerability Data

A flaw was found in the redirect_uri validation logic in Keycloak. This issue may allow a bypass of otherwise explicitly allowed hosts. A successful attack may lead to an access token being stolen, making it possible for the attacker to…

more

impersonate other users.

CWE(s)
CWE-601

Related Threats

MITRE ATT&CK Enterprise Techniques

T1566 Phishing Initial Access
Adversaries may send phishing messages to gain access to victim systems.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2024-8883Same product: Redhat Openshift Container Platform
CVE-2023-6927Same product: Redhat Keycloak
CVE-2024-7260Same product: Redhat Keycloak
CVE-2026-2376Same product: Redhat Enterprise Linux
CVE-2026-3872Same vendor: Redhat
CVE-2026-7504Same vendor: Redhat
CVE-2023-2585Same product: Redhat Enterprise Linux
CVE-2024-1132Same product: Redhat Keycloak
CVE-2024-4629Same product: Redhat Enterprise Linux
CVE-2023-6134Same product: Redhat Enterprise Linux

Affected Assets

redhat
keycloak
≤ 22.0.7
redhat
single sign-on
7.6, all versions
redhat
openshift container platform
4.11, 4.12
redhat
openshift container platform for ibm z
4.10, 4.9
redhat
openshift container platform for linuxone
4.10, 4.9
redhat
openshift container platform for power
4.10, 4.9
redhat
migration toolkit for applications
6.0, 7.0

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V3.7.2

Mitigating Controls (NIST 800-53 r5) AI

SI-10 Information Input Validation good match

Input validation directly checks and rejects untrusted redirect targets before they are used in a response.

AC-4 Information Flow Enforcement partial match

Information flow enforcement can restrict redirects to only approved/trusted destinations, stopping untrusted user-supplied URLs from being followed.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure SDLC practices directly require input validation and untrusted-redirect controls that prevent CWE-601.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.23 Web filtering partial match
mitigates

Preventing access to attacker-controlled or malicious sites stops users from being redirected to untrusted locations via open-redirect or phishing links.

References