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CVE-2025-64099— OpenAM allows use of arbitrary OIDC requested claims values in id_token and user_info

Quick assessment

Affected
OpenIdentityPlatform OpenAM
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.

OpenAM是OpenAM Consortium组织的一种一体化访问管理解决方案。提供身份验证、授权、授权和联合功能。 Open Access Management OpenAM 16.0.0之前版本存在注入漏洞，该漏洞源于claims_parameter_supported参数允许注入任意声明值，可能导致身份伪造。

AI Predicted 9.1 Difficulty: Easy EPSS 0.33% · P24

Possible ATT&CK Techniques 1 AI

T1556.004 · Network Device Authentication
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I. Basic Information for CVE-2025-64099

Vulnerability Information
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Vulnerability Title
OpenAM allows use of arbitrary OIDC requested claims values in id_token and user_info
Source: CVE Program / CVE List V5
Vulnerability Description
Open Access Management (OpenAM) is an access management solution. In versions prior to 16.0.0, if the "claims_parameter_supported" parameter is activated, it is possible, thanks to the "oidc-claims-extension.groovy" script, to inject the value of one's choice into a claim contained in the id_token or in the user_info. In the request of an authorize function, a claims parameter containing a JSON file can be injected. This JSON file allows attackers to customize the claims returned by the "id_token" and "user_info" files. This allows for a very wide range of vulnerabilities depending on how clients use claims. For example, if some clients rely on an email field to identify a user, an attacker can choose the email address they want, and therefore assume any identity they choose. Version 16.0.0 fixes the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U
Source: CVE Program / CVE List V5
Vulnerability Type
输出中的特殊元素转义处理不恰当(注入)
Source: CVE Program / CVE List V5
Vulnerability Title
OpenAM 注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenAM是OpenAM Consortium组织的一种一体化访问管理解决方案。提供身份验证、授权、授权和联合功能。 Open Access Management OpenAM 16.0.0之前版本存在注入漏洞，该漏洞源于claims_parameter_supported参数允许注入任意声明值，可能导致身份伪造。
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
OpenIdentityPlatform OpenAM < 16.0.0 -

II. Public POCs for CVE-2025-64099

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III. Intelligence Information for CVE-2025-64099

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IV. Related Vulnerabilities

Same product: OpenAM
Same vendor: OpenIdentityPlatform
Same weakness: CWE-74

V. Comments for CVE-2025-64099

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