Information Disclosure via Multi-Tenant Authentication Flows in WSO2 Identity Server Allows Cross-Tenant PII Exposure
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-200.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| WSO2 | WSO2 Identity Server | 7.0.0 to before 7.0.0.134; 7.1.0 to before 7.1.0.42 | 7.0.0.134, 7.1.0.42 | Patch available | CNA |
| WSO2 | WSO2 Carbon Identity Application Authentication Framework | 7.0.78 to before 7.0.78.162; 7.8.23 to before 7.8.23.66 | 7.0.78.162, 7.8.23.66, 7.8.550 | Patch available | CNA |
| WSO2 | WSO2 Carbon MagicLink Authenticator Module | 1.1.22 to before 1.1.22.6; 1.1.31 to before 1.1.31.3 | 1.1.22.6, 1.1.31.3, 1.1.45 | Patch available | CNA |
| WSO2 | WSO2 Carbon Abstract OTP Authenticator | 1.0.5 to before 1.0.5.4; 1.0.10 to before 1.0.10.1 | 1.0.5.4, 1.0.10.1, 1.0.24 | Patch available | CNA |
| WSO2 | Email OTP Authenticator | 1.0.30 to before 1.0.30.4 | 1.0.30.4, 1.0.51 | Patch available | CNA |
- WSO2 Identity Server VendorWSO2 Affected 7.0.0 to before 7.0.0.134; 7.1.0 to before 7.1.0.42 Fixed in 7.0.0.134, 7.1.0.42 Patch available CNA
- WSO2 Carbon Identity Application Authentication Framework VendorWSO2 Affected 7.0.78 to before 7.0.78.162; 7.8.23 to before 7.8.23.66 Fixed in 7.0.78.162, 7.8.23.66, 7.8.550 Patch available CNA
- WSO2 Carbon MagicLink Authenticator Module VendorWSO2 Affected 1.1.22 to before 1.1.22.6; 1.1.31 to before 1.1.31.3 Fixed in 1.1.22.6, 1.1.31.3, 1.1.45 Patch available CNA
- WSO2 Carbon Abstract OTP Authenticator VendorWSO2 Affected 1.0.5 to before 1.0.5.4; 1.0.10 to before 1.0.10.1 Fixed in 1.0.5.4, 1.0.10.1, 1.0.24 Patch available CNA
- Email OTP Authenticator VendorWSO2 Affected 1.0.30 to before 1.0.30.4 Fixed in 1.0.30.4, 1.0.51 Patch available CNA
Remediation
- Fix · CNA WSO2 Identity Server (WSO2) Fixed in 7.0.0.134, 7.1.0.42
- Fix · CNA WSO2 Carbon Identity Application Authentication Framework (WSO2) Fixed in 7.0.78.162, 7.8.23.66, 7.8.550
- Fix · CNA WSO2 Carbon MagicLink Authenticator Module (WSO2) Fixed in 1.1.22.6, 1.1.31.3, 1.1.45
- Fix · CNA WSO2 Carbon Abstract OTP Authenticator (WSO2) Fixed in 1.0.5.4, 1.0.10.1, 1.0.24
- Fix · CNA Email OTP Authenticator (WSO2) Fixed in 1.0.30.4, 1.0.51
Timeline
- 2026-10-02 Threatist record created from CVE-2025-13909
- 2026-10-03 Alias added: GHSA-c5g7-4966-ghvv
References
More WSO2 Identity Server vulnerabilities
- TI-2022-11928 Certain WSO2 products allow unrestricted file upload with resultant remote code execution. KEVCVSS 3.1CRITICAL 9.8
- TI-2022-12002 A reflected XSS issue exists in the Management Console of several WSO2 products. CVSS 3.1MEDIUM 6.1
- TI-2018-06290 WSO2 Identity Server before 5.5.0 has XSS via the dashboard, allowing attacks by low-privileged attackers. CVSS 3.0MEDIUM 5.4
- TI-2025-13722 Account Takeover via Conditional Authentication Script Logic in Multiple WSO2 Products CVSS 3.1CRITICAL 9.4
- TI-2025-09712 Potential Broken Access Control in Multiple WSO2 Products via System REST APIs CVSS 3.1CRITICAL 9.8
- TI-2024-06413 Incorrect Authorization in Multiple WSO2 Products via Account Recovery SOAP Admin Service Leading to Account Takeover CVSS 3.1CRITICAL 9.8
Sources
- CVE-2025-13909 · CVE Program
- CVE-2025-13909 · NVD
- FIRST EPSS
- GHSA-c5g7-4966-ghvv · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences