If duplicate claim values exist across user stores, this issue can lead to identity confusion due to incorrect implicit associations when using an external Identity Provider (IDP). Legitimate user accounts in the primary user store may fail to associate correctly with their corresponding external IDP accounts, potentially restricting access if the secondary account has fewer privileges. Deployments are not affected if no secondary user stores are configured, implicit association is disabled, or claim values are globally unique.
Project Subscriptions
No advisories yet.
Solution
Follow the instructions given on https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2025-4493/#solution
Workaround
No workaround given by the vendor.
Thu, 06 Aug 2026 13:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Weaknesses | CWE-639 | |
| Metrics |
ssvc
|
Thu, 06 Aug 2026 09:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Weaknesses | CWE-287 |
Thu, 06 Aug 2026 08:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | When secondary user stores are configured, the implicit-association resolver incorrectly initializes from a secondary user store and bypasses the primary user store during search and uniqueness checks. This allows a subject to be associated with an unintended local account if the same lookup claim (e.g., username or email) exists in both the primary and a secondary store. If duplicate claim values exist across user stores, this issue can lead to identity confusion due to incorrect implicit associations when using an external Identity Provider (IDP). Legitimate user accounts in the primary user store may fail to associate correctly with their corresponding external IDP accounts, potentially restricting access if the secondary account has fewer privileges. Deployments are not affected if no secondary user stores are configured, implicit association is disabled, or claim values are globally unique. | |
| Title | Improper Implicit Association via User Store Initialization in WSO2 Identity Server [Identity Confusion / External IDP Use] | |
| First Time appeared |
Wso2
Wso2 token Exchange Grant Type For Oauth Wso2 wso2 Identity Server |
|
| CPEs | cpe:2.3:a:wso2:token_exchange_grant_type_for_oauth:*:*:*:*:*:*:*:* cpe:2.3:a:wso2:wso2_identity_server:*:*:*:*:*:*:*:* |
|
| Vendors & Products |
Wso2
Wso2 token Exchange Grant Type For Oauth Wso2 wso2 Identity Server |
|
| References |
| |
| Metrics |
cvssV3_1
|
Projects
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Status: PUBLISHED
Assigner: WSO2
Published:
Updated: 2026-08-06T12:36:25.111Z
Reserved: 2025-10-16T10:51:29.910Z
Link: CVE-2025-11850
Updated: 2026-08-06T12:36:21.569Z
No data.
No data.
OpenCVE Enrichment
Updated: 2026-08-06T09:30:02Z