Vulnerability · Published Aug 6, 2026 · Assigned by WSO2
CVE-2025-13909Information Disclosure via Multi-Tenant Authentication Flows in WSO2 Identity Server Allows Cross-Tenant PII Exposure
Medium 4.3
In plain English
A medium-severity information exposure in Email OTP Authenticator from WSO2. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 29% of all known vulnerabilities).
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| WSO2 | WSO2 Identity Server | 7.0.0 – before 7.0.0.1347.1.0 – before 7.1.0.42 |
| WSO2 | WSO2 Carbon Identity Application Authentication Framework | 7.0.78 – before 7.0.78.1627.8.23 – before 7.8.23.66 |
| WSO2 | WSO2 Carbon MagicLink Authenticator Module | 1.1.22 – before 1.1.22.61.1.31 – before 1.1.31.3 |
| WSO2 | WSO2 Carbon Abstract OTP Authenticator | 1.0.5 – before 1.0.5.41.0.10 – before 1.0.10.1 |
| WSO2 | Email OTP Authenticator | 1.0.30 – before 1.0.30.4 |
Weakness: CWE-200, CWE-20 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N