CVE-2025-13909Network attack vector

Cross-tenant PII disclosure via wrong tenant preprocessing

Published Aug 6, 2026 · Updated Aug 6, 2026

Improper input validation in WSO2 Identity Server 7.0.0 and 7.1.0 allows remote authenticated users to disclose cross-tenant PII. FrameworkUtils and the affected authenticators preprocess usernames with the user tenant domain instead of the authentication-context tenant domain, resolving identities against the wrong tenant. Exploitation requires a multi-tenant deployment using Email OTP, SMS OTP, or Magic Link as a first factor; a low-privileged account can read user details such as mobile numbers, with no reported integrity or availability impact.

CVSS severity4.3

Medium

EPSS probability0.21%

Next 30 days · Sep 16, 2026

Known exploitationUnconfirmed

Based on sourced intelligence

Hinoki checkNot available

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Summary

What happened

The record

CVE: CVE-2025-13909
Published: Aug 6, 2026
Updated: Aug 6, 2026

Vendor: WSO2
Product: WSO2 Identity Server
Classifications: CWE-20, CWE-200

Attack vector: network
Privileges: authenticated

Timeline

How it unfolded

Aug 6, 2026CVE publishedPublication date reported by the CVE source.
Aug 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

Affected versionversion=7.0.0 <7.0.0.134
Affected versionversion=7.1.0 <7.1.0.42

What conditions does exploitation require?

Attack vectornetwork

Required privilegesauthenticated

What is affected?

WSO2 · WSO2 Identity Serverversion=7.0.0 <7.0.0.134; version=7.1.0 <7.1.0.42

WSO2 · WSO2 Carbon Abstract OTP Authenticatorversion=1.0.10 <1.0.10.1; version=1.0.5 <1.0.5.4

WSO2 · WSO2 Carbon MagicLink Authenticator Moduleversion=1.1.22 <1.1.22.6; version=1.1.31 <1.1.31.3

WSO2 · Email OTP Authenticatorversion=1.0.30 <1.0.30.4

WSO2 · WSO2 Carbon Identity Application Authentication Frameworkversion=7.0.78 <7.0.78.162; version=7.8.23 <7.8.23.66

Published CVSS scores

4.3WSO2CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026

Latest reporting daySep 16, 2026

Latest daily unique IPsUnavailable

Prior 30-day averageUnavailable

SourceShadowserver honeypots (KEV)

Vectornetwork

Privilegesauthenticated

Known exploitationUnconfirmed

Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation

CWE-200Exposure of Sensitive Information to an Unauthorized Actor

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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