CVE-2021-3827
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I. Basic Information for CVE-2021-3827
Vulnerability Information
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Vulnerability Title
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Description
A flaw was found in keycloak, where the default ECP binding flow allows other authentication flows to be bypassed. By exploiting this behavior, an attacker can bypass the MFA authentication by sending a SOAP request with an AuthnRequest and Authorization header with the user's credentials. The highest threat from this vulnerability is to confidentiality and integrity.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
认证机制不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Red Hat Keycloak 授权问题漏洞
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，该漏洞源于默认的 ECP 绑定流允许绕过其他身份验证流。攻击者可以通过发送带有 AuthnRequest 和 Authorization 标头以及用户凭据的 SOAP 请求来绕过 MFA 身份验证。
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 |
|---|---|---|---|---|
| - | keycloak | Fixed in v18.0.0 | - |
II. Public POCs for CVE-2021-3827
| # | POC Description | Source Link | Shenlong Link |
|---|
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- https://bugzilla.redhat.com/show_bug.cgi?id=2007512x_refsource_MISC
- https://access.redhat.com/security/cve/CVE-2021-3827x_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2021-3827
Same Patch Batch · n/a · 2022-08-23 · 54 CVEs total
| CVE-2022-24381 | 7.5 HIGH | Denial of Service (DoS) |
| CVE-2022-25888 | 7.5 HIGH | Denial of Service (DoS) |
| CVE-2022-25761 | 7.5 HIGH | Denial of Service (DoS) |
| CVE-2022-24298 | 7.5 HIGH | Denial of Service (DoS) |
| CVE-2022-21208 | 7.5 HIGH | Denial of Service (DoS) |
| CVE-2022-25231 | 7.5 HIGH | Denial of Service (DoS) |
| CVE-2022-25304 | 7.5 HIGH | Denial of Service (DoS) |
| CVE-2022-25302 | 7.5 HIGH | Denial of Service (DoS) |
| CVE-2022-37428 | 6.5 MEDIUM | PowerDNS Recursor 安全漏洞 |
| CVE-2021-3764 | Linux kernel 安全漏洞 | |
| CVE-2021-3670 | Samba ldb 安全漏洞 | |
| CVE-2022-35115 | IceWarp WebClient SQL注入漏洞 | |
| CVE-2020-35509 | Red Hat Keycloak 信任管理问题漏洞 | |
| CVE-2021-3839 | DPDK 缓冲区错误漏洞 | |
| CVE-2022-37111 | BlueCMS SQL注入漏洞 | |
| CVE-2022-37112 | BlueCMS SQL注入漏洞 | |
| CVE-2022-37113 | BlueCMS SQL注入漏洞 | |
| CVE-2022-37223 | jfinal cms SQL注入漏洞 | |
| CVE-2022-37199 | jfinal cms SQL注入漏洞 | |
| CVE-2022-36261 | taoCMS 路径遍历漏洞 |
Showing top 20 of 54 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: keycloak
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Keycloak-server: debug default bind address - CVE-2025-12390
Org.keycloak.protocol.oidc.endpoints.logoutendpoint: offline - CVE-2025-10939
Org.keycloak/keycloak-quarkus-server: unable to restrict acc
Same vendor: n/a
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Same weakness: CWE-287
- CVE-2026-8244
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V. Comments for CVE-2021-3827
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