What’s Vulnerable › Vulnerabilities
CVE-2025-13909: Information Disclosure via Multi-Tenant Authentication Flows in WSO2 Identity Server Allows Cross-Tenant PII Exposure
- Severity: medium (CVSS 4.3 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-08-06 · updated 2026-09-29
- Weakness: CWE-20
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
- WSO2 Identity Server: from 7.0.0 before 7.0.0.134; from 7.1.0 before 7.1.0.42 — fixed in 7.0.0.134, 7.1.0.42
How to fix
Upgrade to a fixed version: WSO2 Identity Server 7.0.0.134, 7.1.0.42. Check the vendor advisory for mitigations.
References
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