CVE-2025-11850
Improper Implicit Association via User Store Initialization in WSO2 Identity Server [Identity Confusion / External IDP Use]
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.
INFO
Published Date :
Aug. 6, 2026, 8:16 a.m.
Last Modified :
Aug. 6, 2026, 8:16 a.m.
Remotely Exploit :
Yes !
Source :
ed10eef1-636d-4fbe-9993-6890dfa878f8
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | ed10eef1-636d-4fbe-9993-6890dfa878f8 |
Solution
- Update software to resolve the implicit association bug.
- Ensure claim values are unique across user stores.
- Disable implicit association if not needed.
- Configure secondary user stores carefully.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-11850.
| URL | Resource |
|---|---|
| https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2025-4493/ |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-11850 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-11850
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-11850 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-11850 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by ed10eef1-636d-4fbe-9993-6890dfa878f8
Aug. 06, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'WSO2', 'product': 'WSO2 Identity Server', 'versions': [{'status': 'affected', 'version': '7.0.0', 'lessThan': '7.0.0.132', 'versionType': 'custom'}, {'status': 'affected', 'version': '7.1.0', 'lessThan': '7.1.0.40', 'versionType': 'custom'}], 'defaultStatus': 'unaffected'}, {'vendor': 'WSO2', 'product': 'Token Exchange Grant Type For OAuth', 'versions': [{'status': 'unaffected', 'version': '1.1.19', 'versionType': 'custom', 'lessThanOrEqual': '*'}], 'packageName': 'org.wso2.carbon.extension.identity.oauth2.grantType.token.exchange:org.wso2.carbon.identity.oauth2.grant.token.exchange', 'defaultStatus': 'unknown'}] 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L Added Reference https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2025-4493/