---
id: CVE-2025-13909
title: >-
  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
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 tenan…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'
cwe:
  - CWE-20
  - CWE-200
vendor: wso2
product: identity_server
affected:
  - 'identity_server >= 7.0.0, < 7.0.0.134'
  - 'identity_server >= 7.1.0, < 7.1.0.42'
patched:
  - identity_server 7.1.0.42
published: '2026-08-06'
updated: '2026-09-29'
sourceUpdated: '2026-09-29T14:10:00.117'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-13909'
references:
  - url: >-
      https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2025-4731/
    label: ed10eef1-636d-4fbe-9993-6890dfa878f8
tags:
  - nvd
epss: 0.00348
epssPercentile: 0.25863
ingestedAt: '2026-09-29T14:36:14.078Z'
---

## Overview

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

- `identity_server >= 7.0.0, < 7.0.0.134`
- `identity_server >= 7.1.0, < 7.1.0.42`

## Remediation

Upgrade past the affected range:

- `identity_server 7.1.0.42`