CVE-2025-13909

Information Disclosure via Multi-Tenant Authentication Flows in WSO2 Identity Server Allows Cross-Tenant PII Exposure

Published Aug 6, 2026 CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
Description
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.

Remediation

Vendor Solution

Follow the instructions given on https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2025-4731/#solution

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Wso2 carbon Identity Application Authentication Framework
Wso2 identity Server
Vendors & Products Wso2 carbon Identity Application Authentication Framework
Wso2 identity Server
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description 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.
Title Information Disclosure via Multi-Tenant Authentication Flows in WSO2 Identity Server Allows Cross-Tenant PII Exposure
First Time appeared Wso2
Wso2 email Otp Authenticator
Wso2 wso2 Carbon Abstract Otp Authenticator
Wso2 wso2 Carbon Identity Application Authentication Framework
Wso2 wso2 Carbon Magiclink Authenticator Module
Wso2 wso2 Identity Server
Weaknesses CWE-20
CWE-200
CPEs cpe:2.3:a:wso2:email_otp_authenticator:*:*:*:*:*:*:*:*
cpe:2.3:a:wso2:wso2_carbon_abstract_otp_authenticator:*:*:*:*:*:*:*:*
cpe:2.3:a:wso2:wso2_carbon_identity_application_authentication_framework:*:*:*:*:*:*:*:*
cpe:2.3:a:wso2:wso2_carbon_magiclink_authenticator_module:*:*:*:*:*:*:*:*
cpe:2.3:a:wso2:wso2_identity_server:*:*:*:*:*:*:*:*
Vendors & Products Wso2
Wso2 email Otp Authenticator
Wso2 wso2 Carbon Abstract Otp Authenticator
Wso2 wso2 Carbon Identity Application Authentication Framework
Wso2 wso2 Carbon Magiclink Authenticator Module
Wso2 wso2 Identity Server
References
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'}