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CVE-2025-27370

Quick assessment

Affected
OpenID OpenID Connect
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OpenID Connect Core是OpenID基金会的一个 OAuth 2.0 协议之上的简单身份层。 OpenID Connect Core 1.0版本存在安全漏洞。攻击者利用该漏洞可以可以使用私钥 JWT 冒充客户端。

CVSS 6.9 · Medium EPSS 0.34% · P27
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I. Basic Information for CVE-2025-27370

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
OpenID Connect Core through 1.0 errata set 2 allows audience injection in certain situations. When the private_key_jwt authentication mechanism is used, a malicious Authorization Server could trick a Client into writing attacker-controlled values into the audience, including token endpoints or issuer identifiers of other Authorization Servers. The malicious Authorization Server could then use these private key JWTs to impersonate the Client.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用基本弱点进行的认证绕过
Source: CVE Program / CVE List V5
Vulnerability Title
OpenID Connect Core 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenID Connect Core是OpenID基金会的一个 OAuth 2.0 协议之上的简单身份层。 OpenID Connect Core 1.0版本存在安全漏洞。攻击者利用该漏洞可以可以使用私钥 JWT 冒充客户端。
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
OpenID OpenID Connect 0 ~ 1.0 errata set 2 -

II. Public POCs for CVE-2025-27370

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III. Intelligence Information for CVE-2025-27370

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Vendor Advisories for CVE-2025-27370 (1)

Proof of Concept for CVE-2025-27370 (1)

Security Blog Posts for CVE-2025-27370 (1)

News Coverage for CVE-2025-27370 (1)

IV. Related Vulnerabilities

Same weakness: CWE-305

V. Comments for CVE-2025-27370

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