Data Exposure Vulnerability in WSO2 Authentication Methods
CVE-2025-13909

4.3MEDIUM

Key Information:

Vendor

Wso2

Status
Wso2 Identity Server
Wso2 Carbon Identity Application Authentication Framework
Wso2 Carbon Magiclink Authenticator Module
Wso2 Carbon Abstract Otp Authenticator
Vendor
CVE Published:
6 August 2026

What is CVE-2025-13909?

A significant vulnerability in WSO2's authentication methods allows insufficient validation of authentication requests, particularly when Email OTP, SMS OTP, or Magic Link are used as first-factor authenticators. This flaw compromises tenant isolation, leading to the potential exposure of personally identifiable information (PII) across user accounts. Attackers exploiting this vulnerability may gain unauthorized access to sensitive user data, such as mobile numbers, resulting in severe privacy breaches and possible regulatory repercussions.

Affected Version(s)

Email OTP Authenticator 1.0.30 < 1.0.30.4

WSO2 Carbon Abstract OTP Authenticator 1.0.5 < 1.0.5.4

WSO2 Carbon Abstract OTP Authenticator 1.0.10 < 1.0.10.1

References

https://security.docs.wso2.com/en/latest/security-announc...
vendor-advisory

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.