CVE-2025-15039Network attack vector

Account takeover via skipped authentication steps

Published Aug 6, 2026 · Updated Aug 6, 2026

Authentication bypass in WSO2 identity products allows remote attackers to take over accounts through conditional-authentication flows. The Conditional Authentication script mishandles callbacks when executeStep re-runs the same step, allowing intermediate challenges to be skipped. Exploitation requires an affected secondary authenticator, a registered callback, step re-execution, user enrollment, and completion of every preceding step.

CVSS severity9.4
Critical
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in WSO2 identity products allows remote attackers to take over accounts through conditional-authentication flows. The Conditional Authentication script mishandles callbacks when executeStep re-runs the same step, allowing intermediate challenges to be skipped. Exploitation requires an affected secondary authenticator, a registered callback, step re-execution, user enrollment, and completion of every preceding step.

The record

CVE
CVE-2025-15039
Published
Aug 6, 2026
Updated
Aug 6, 2026
Vendor
WSO2
Product
WSO2 Identity Server
Classifications
CWE-693, CAPEC-134, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 6, 2026CVE publishedPublication date reported by the CVE source.
  2. 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.

  1. Affected versionversion=5.10.0 <5.10.0.385
  2. Affected versionversion=5.11.0 <5.11.0.432
  3. Affected versionversion=5.7.0 <5.7.0.130
  4. Affected versionversion=5.8.0 <5.8.0.113
  5. Affected versionversion=5.9.0 <5.9.0.173
  6. Affected versionversion=6.0.0 <6.0.0.259
  7. Affected versionversion=6.1.0 <6.1.0.260
  8. Affected versionversion=7.0.0 <7.0.0.138
  9. Affected versionversion=7.1.0 <7.1.0.45
  10. Affected versionversion=7.1.0 <7.1.0.49
  11. Affected versionversion=7.2.0 <7.2.0.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

WSO2 · WSO2 Identity Serverversion=5.10.0 <5.10.0.385; version=5.11.0 <5.11.0.432; version=5.7.0 <5.7.0.130; version=5.8.0 <5.8.0.113; version=5.9.0 <5.9.0.173; version=6.0.0 <6.0.0.259; version=6.1.0 <6.1.0.260; version=7.0.0 <7.0.0.138; version=7.1.0 <7.1.0.45; version=7.1.0 <7.1.0.49; version=7.2.0 <7.2.0.7
WSO2 · WSO2 Open Banking AMversion=1.4.0 <1.4.0.143; version=1.5.0 <1.5.0.144; version=2.0.0 <2.0.0.405
WSO2 · WSO2 Traffic Managerversion=4.5.0 <4.5.0.43; version=4.6.0 <4.6.0.8
WSO2 · WSO2 API Control Planeversion=4.5.0 <4.5.0.45; version=4.6.0 <4.6.0.9
WSO2 · WSO2 Open Banking IAMversion=2.0.0 <2.0.0.425
WSO2 · WSO2 Identity Server as Key Managerversion=5.10.0 <5.10.0.376; version=5.7.0 <5.7.0.129; version=5.9.0 <5.9.0.179
WSO2 · WSO2 Carbon Identity Application Authentication Frameworkversion=5.12.153 <5.12.153.66; version=5.12.387 <5.12.387.48; version=5.14.97 <5.14.97.94; version=5.17.118 <5.17.118.24; version=5.17.5 <5.17.5.337; version=5.18.187 <5.18.187.334; version=5.18.248 <5.18.248.34; version=5.23.8 <5.23.8.221; version=5.24.8 <5.24.8.29; version=5.25.705 <5.25.705.23; version=5.25.713 <5.25.713.12; version=5.25.724 <5.25.724.8; version=5.25.736 <5.25.736.3; version=5.25.92 <5.25.92.177; version=7.0.78 <7.0.78.171; version=7.8.23 <7.8.23.95; version=7.8.586 <7.8.586.21
WSO2 · WSO2 Open Banking KMversion=1.4.0 <1.4.0.137; version=1.5.0 <1.5.0.127
WSO2 · WSO2 API Managerversion=2.6.0 <2.6.0.150; version=3.0.0 <3.0.0.180; version=3.1.0 <3.1.0.356; version=3.2.0 <3.2.0.460; version=3.2.1 <3.2.1.79; version=4.0.0 <4.0.0.381; version=4.1.0 <4.1.0.244; version=4.2.0 <4.2.0.184; version=4.3.0 <4.3.0.95; version=4.4.0 <4.4.0.59; version=4.5.0 <4.5.0.44; version=4.6.0 <4.6.0.8
WSO2 · WSO2 Universal Gatewayversion=4.5.0 <4.5.0.43; version=4.5.0 <4.5.0.44; version=4.6.0 <4.6.0.8

Published CVSS scores

9.4WSO2 LLCCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-693Protection Mechanism Failure
CAPEC-134Circumventing Security Controls
T1190Exploit Public-Facing Application

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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