Medium 4.3Published Aug 6, 2026

CVE-2025-13909Information Disclosure via Multi-Tenant Authentication Flows in WSO2 Identity Server Allows Cross-Tenant PII Exposure

Updated under an hour ago (Oct 27, 2026, 1:50 PM ET)

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It affects WSO2 Identity Server and 4 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for WSO2 Identity Server

Exploited in the last 30 days

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.

CVSS: 4.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Weakness (CWE): CWE-200, CWE-20
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: WSO2
NVD analysis: Analyzed
Record last updated: Aug 6, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

WSO2 WSO2 Identity Server wso2:identity_server (from the name)	from 7.0.0 before 7.0.0.134; from 7.1.0 before 7.1.0.42	CNA record
WSO2 WSO2 Carbon Identity Application Authentication Framework wso2:carbon_identity_application_authentication_framework (from the name)	from 7.0.78 before 7.0.78.162; from 7.8.23 before 7.8.23.66; from 7.8.550 not affected	CNA record
WSO2 WSO2 Carbon MagicLink Authenticator Module wso2:carbon_magiclink_authenticator_module (from the name)	from 1.1.22 before 1.1.22.6; from 1.1.31 before 1.1.31.3; from 1.1.45 not affected	CNA record
WSO2 WSO2 Carbon Abstract OTP Authenticator wso2:carbon_abstract_otp_authenticator (from the name)	from 1.0.5 before 1.0.5.4; from 1.0.10 before 1.0.10.1; from 1.0.24 not affected	CNA record
WSO2 Email OTP Authenticator wso2:email_otp_authenticator (from the name)	from 1.0.30 before 1.0.30.4; from 1.0.51 not affected	CNA record
wso2 identity_server wso2:identity_server	from 7.0.0 before 7.0.0.134; from 7.1.0 before 7.1.0.42	NVD

References

References

https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2025-4731/	vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.