OpenAM: Using arbitrary OIDC requested claims values in id_token and user_info is allowed
Summary
If the "claims_parameter_supported" parameter is activated, it is possible through the "oidc-claims-extension.groovy" script, to inject the value of choice into a claim contained in the id_token or in the user_info. Authorization function requests do not prevent a claims parameter containing a JSON file to be injected. This JSON file allows users to customize 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, users can choose to entera any email address, and therefore assume any chosen identity.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | org.openidentityplatform.openam:openam-oauth2 | < 16.0.3 | 16.0.3 |
References
- https://github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-39hr-239p-fhqc
- https://nvd.nist.gov/vuln/detail/CVE-2025-64099
- https://github.com/OpenIdentityPlatform/OpenAM/commit/4254b34b2b8b4867f2e7fccfac73904213d48510
- https://github.com/OpenIdentityPlatform/OpenAM
- https://github.com/OpenIdentityPlatform/OpenAM/releases/tag/16.0.3
- CVSS vector
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- Weakness (CWE)
CWE-74, CWE-94- Platform
- Java / Kotlin (Maven)
- Package
org.openidentityplatform.openam:openam-oauth2- Disclosed
- 12.11.2025
- Updated
- 11.10.2026 12:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-39hr-239p-fhqc - CC BY 4.0
Vulnerability history: org.openidentityplatform.openam:openam-oauth2
All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 7
- First → latest
- 07.2024 07.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 1
- High 4
- Medium 2
Disclosures per year
- 2024: 1
- 2025: 1
- 2026: 5
-
OpenAM: Using arbitrary OIDC requested claims values in id_token and user_info is allowed this entry
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