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CVE-2023-6134— Keycloak: reflected xss via wildcard in oidc redirect_uri

Quick assessment

Affected
Red Hat Red Hat build of Keycloak 22
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Red Hat Keycloak是美国红帽（Red Hat）公司的一套为现代应用和服务提供身份验证和管理功能的软件。 Red Hat Keycloak 存在安全漏洞，该漏洞源于存在跨站脚本（XSS）漏洞。

CVSS 4.6 · Medium EPSS 1.32% · P70

Affected Version Matrix 15

VendorProduct Version RangeStatus
Red Hat Red Hat build of Keycloak 22 22.0.7-1< * unaffected
22-6< * unaffected
22-9< * unaffected
Red Hat Red Hat build of Keycloak 22.0.7 any unaffected
Red Hat Red Hat Single Sign-On 7 any unaffected
Red Hat Red Hat Single Sign-On 7.6 for RHEL 7 0:18.0.11-2.redhat_00003.1.el7sso< * unaffected
0:18.0.12-1.redhat_00001.1.el7sso< * unaffected
Red Hat Red Hat Single Sign-On 7.6 for RHEL 8 0:18.0.11-2.redhat_00003.1.el8sso< * unaffected
0:18.0.12-1.redhat_00001.1.el8sso< * unaffected
Red Hat Red Hat Single Sign-On 7.6 for RHEL 9 0:18.0.11-2.redhat_00003.1.el9sso< * unaffected
0:18.0.12-1.redhat_00001.1.el9sso< * unaffected
Red Hat RHEL-8 based Middleware Containers 7.6-38< * unaffected
7.6.6-2< * unaffected
7.6-41< * unaffected
Red Hat Single Sign-On 7.6.6 any unaffected
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I. Basic Information for CVE-2023-6134

Vulnerability Information
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Vulnerability Title
Keycloak: reflected xss via wildcard in oidc redirect_uri
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in Keycloak that prevents certain schemes in redirects, but permits them if a wildcard is appended to the token. This issue could allow an attacker to submit a specially crafted request leading to cross-site scripting (XSS) or further attacks. This flaw is the result of an incomplete fix for CVE-2020-10748.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Red Hat Keycloak 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Red Hat Keycloak是美国红帽（Red Hat）公司的一套为现代应用和服务提供身份验证和管理功能的软件。 Red Hat Keycloak 存在安全漏洞，该漏洞源于存在跨站脚本（XSS）漏洞。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat build of Keycloak 22 22.0.7-1 ~ * cpe:/a:redhat:build_keycloak:22::el9
Red Hat Red Hat build of Keycloak 22 22-6 ~ * cpe:/a:redhat:build_keycloak:22::el9
Red Hat Red Hat build of Keycloak 22 22-9 ~ * cpe:/a:redhat:build_keycloak:22::el9
Red Hat Red Hat build of Keycloak 22.0.7 - cpe:/a:redhat:build_keycloak:22
Red Hat Red Hat Single Sign-On 7 - cpe:/a:redhat:red_hat_single_sign_on:7.6
Red Hat Red Hat Single Sign-On 7.6 for RHEL 7 0:18.0.11-2.redhat_00003.1.el7sso ~ * cpe:/a:redhat:red_hat_single_sign_on:7.6::el7
Red Hat Red Hat Single Sign-On 7.6 for RHEL 7 0:18.0.12-1.redhat_00001.1.el7sso ~ * cpe:/a:redhat:red_hat_single_sign_on:7.6::el7
Red Hat Red Hat Single Sign-On 7.6 for RHEL 8 0:18.0.11-2.redhat_00003.1.el8sso ~ * cpe:/a:redhat:red_hat_single_sign_on:7.6::el8
Red Hat Red Hat Single Sign-On 7.6 for RHEL 8 0:18.0.12-1.redhat_00001.1.el8sso ~ * cpe:/a:redhat:red_hat_single_sign_on:7.6::el8
Red Hat Red Hat Single Sign-On 7.6 for RHEL 9 0:18.0.11-2.redhat_00003.1.el9sso ~ * cpe:/a:redhat:red_hat_single_sign_on:7.6::el9
Red Hat Red Hat Single Sign-On 7.6 for RHEL 9 0:18.0.12-1.redhat_00001.1.el9sso ~ * cpe:/a:redhat:red_hat_single_sign_on:7.6::el9
Red Hat RHEL-8 based Middleware Containers 7.6-38 ~ * cpe:/a:redhat:rhosemc:1.0::el8
Red Hat RHEL-8 based Middleware Containers 7.6.6-2 ~ * cpe:/a:redhat:rhosemc:1.0::el8
Red Hat RHEL-8 based Middleware Containers 7.6-41 ~ * cpe:/a:redhat:rhosemc:1.0::el8
Red Hat Single Sign-On 7.6.6 - cpe:/a:redhat:red_hat_single_sign_on:7.6

II. Public POCs for CVE-2023-6134

# POC Description Source Link Shenlong Link
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default-local-qwen3.6 · 9133 chars
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III. Intelligence Information for CVE-2023-6134

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Vendor Advisories for CVE-2023-6134 (13)

IV. Related Vulnerabilities

Same product: Red Hat build of Keycloak 22
Same vendor: Red Hat
Same weakness: CWE-79

V. Comments for CVE-2023-6134

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