WSO2 Identity Server improper authorization

Summaryinfo

A vulnerability was found in WSO2 Identity Server. It has been declared as problematic. Affected by this vulnerability is an unknown functionality of the component Carbon Identity Application Authentication Framework/Carbon MagicLink Authenticator Module/Carbon Abstract OTP Authenticator/Email OTP Authenticator. Executing a manipulation can lead to improper authorization. This vulnerability appears as CVE-2025-13909. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability has been found in WSO2 Identity Server (version now known) and classified as problematic. This vulnerability affects some unknown processing of the component Carbon Identity Application Authentication Framework/Carbon MagicLink Authenticator Module/Carbon Abstract OTP Authenticator/Email OTP Authenticator. The manipulation with an unknown input leads to a improper authorization vulnerability. The CWE definition for the vulnerability is CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. As an impact it is known to affect confidentiality. CVE summarizes:

The system accepts authentication requests without sufficient validation to enforce tenant isolation when using Email OTP, SMS OTP, or Magic Link as first-factor authenticators. This failure to adequately separate user data between tenants can lead to the exposure of personally identifiable information. Successful exploitation allows an attacker to disclose personally identifiable information of users in different tenants, resulting in privacy violations and potential regulatory non-compliance. This may include unauthorized access to user details such as mobile numbers.

The advisory is available at security.docs.wso2.com. This vulnerability was named CVE-2025-13909 since 12/02/2025. The exploitation appears to be easy. The attack can be initiated remotely. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 08/06/2026). This vulnerability is assigned to T1548.002 by the MITRE ATT&CK project.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• WSO2

Name

• Identity Server

License

• commercial

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CPE 2.2info

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