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TI-2025-12556 Aliases CVE-2025-13736GHSA-g8w9-p6wx-8fxc

Username Enumeration via Login Interface in Multiple WSO2 Products Allows User Account Discovery

Priority LOW 17CWE-203Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
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-203.

Summary

When Multi-Attribute Login is enabled, the login interface fails to consistently mask the existence of user accounts. For valid users, the server resolves and displays their canonical username, while for non-existent users, it echoes the original input. This occurs regardless of the validate_username configuration. The discovery of valid usernames can increase the risk of brute force attacks, social engineering attacks, and targeted information leakage. Attackers can leverage this information to craft more effective phishing campaigns or social engineering tactics to compromise user accounts or extract sensitive data.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00269 19th percentileScored 2026-11-07
Fix Fixed WSO2 Identity Server as Key Manager (WSO2): 5.10.0.371WSO2 Identity Server (WSO2): 5.10.0.380, 5.11.0.427, 6.0.0.254 +4+3 more products

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

VendorProductAffected versionsFixed inStatusSource
WSO2WSO2 Identity Server as Key Manager5.10.0 to before 5.10.0.3715.10.0.371Patch availableCNA
WSO2WSO2 Identity Server5.10.0 to before 5.10.0.380; 5.11.0 to before 5.11.0.427; 6.0.0 to before 6.0.0.254; 6.1.0 to before 6.1.0.255; 7.0.0 to before 7.0.0.132; 7.1.0 to before 7.1.0.40; 7.2.0 to before 7.2.0.25.10.0.380, 5.11.0.427, 6.0.0.254, 6.1.0.255, 7.0.0.132, 7.1.0.40, 7.2.0.2Patch availableCNA
WSO2WSO2 Open Banking AM2.0.0 to before 2.0.0.4002.0.0.400Patch availableCNA
WSO2WSO2 API Manager3.1.0 to before 3.1.0.351; 3.2.0 to before 3.2.0.455; 4.0.0 to before 4.0.0.3753.1.0.351, 3.2.0.455, 4.0.0.375Patch availableCNA
WSO2WSO2 Open Banking IAM2.0.0 to before 2.0.0.4202.0.0.420Patch availableCNA
  • WSO2 Identity Server as Key Manager VendorWSO2 Affected 5.10.0 to before 5.10.0.371 Fixed in 5.10.0.371 Patch available CNA
  • WSO2 Identity Server VendorWSO2 Affected 5.10.0 to before 5.10.0.380; 5.11.0 to before 5.11.0.427; 6.0.0 to before 6.0.0.254; 6.1.0 to before 6.1.0.255; 7.0.0 to before 7.0.0.132; 7.1.0 to before 7.1.0.40; 7.2.0 to before 7.2.0.2 Fixed in 5.10.0.380, 5.11.0.427, 6.0.0.254, 6.1.0.255, 7.0.0.132, 7.1.0.40, 7.2.0.2 Patch available CNA
  • WSO2 Open Banking AM VendorWSO2 Affected 2.0.0 to before 2.0.0.400 Fixed in 2.0.0.400 Patch available CNA
  • WSO2 API Manager VendorWSO2 Affected 3.1.0 to before 3.1.0.351; 3.2.0 to before 3.2.0.455; 4.0.0 to before 4.0.0.375 Fixed in 3.1.0.351, 3.2.0.455, 4.0.0.375 Patch available CNA
  • WSO2 Open Banking IAM VendorWSO2 Affected 2.0.0 to before 2.0.0.420 Fixed in 2.0.0.420 Patch available CNA

CPE configurations NVD · 5

CPEVersionsRoleVendor
cpe:2.3:a:wso2:api_manager:*:*:*:*:*:*:*:*3.1.0 to before 3.1.0.351; 3.2.0 to before 3.2.0.455; 4.0.0 to before 4.0.0.375VulnerableWSO2
cpe:2.3:a:wso2:identity_server:*:*:*:*:*:*:*:*5.10.0 to before 5.10.0.380; 5.11.0 to before 5.11.0.427; 6.0.0 to before 6.0.0.254; 6.1.0 to before 6.1.0.255; 7.0.0 to before 7.0.0.132; 7.1.0 to before 7.1.0.40; 7.2.0 to before 7.2.0.2VulnerableWSO2
cpe:2.3:a:wso2:identity_server_as_key_manager:*:*:*:*:*:*:*:*5.10.0 to before 5.10.0.371VulnerableWSO2
cpe:2.3:a:wso2:open_banking_am:*:*:*:*:*:*:*:*2.0.0 to before 2.0.0.400VulnerableWSO2
cpe:2.3:a:wso2:open_banking_iam:*:*:*:*:*:*:*:*2.0.0 to before 2.0.0.420VulnerableWSO2
  • cpe:2.3:a:wso2:api_manager:*:*:*:*:*:*:*:* Versions 3.1.0 to before 3.1.0.351; 3.2.0 to before 3.2.0.455; 4.0.0 to before 4.0.0.375 Vulnerable ·WSO2
  • cpe:2.3:a:wso2:identity_server:*:*:*:*:*:*:*:* Versions 5.10.0 to before 5.10.0.380; 5.11.0 to before 5.11.0.427; 6.0.0 to before 6.0.0.254; 6.1.0 to before 6.1.0.255; 7.0.0 to before 7.0.0.132; 7.1.0 to before 7.1.0.40; 7.2.0 to before 7.2.0.2 Vulnerable ·WSO2
  • cpe:2.3:a:wso2:identity_server_as_key_manager:*:*:*:*:*:*:*:* Versions 5.10.0 to before 5.10.0.371 Vulnerable ·WSO2
  • cpe:2.3:a:wso2:open_banking_am:*:*:*:*:*:*:*:* Versions 2.0.0 to before 2.0.0.400 Vulnerable ·WSO2
  • cpe:2.3:a:wso2:open_banking_iam:*:*:*:*:*:*:*:* Versions 2.0.0 to before 2.0.0.420 Vulnerable ·WSO2

Remediation

  • Fix · CNA WSO2 Identity Server as Key Manager (WSO2) Fixed in 5.10.0.371
  • Fix · CNA WSO2 Identity Server (WSO2) Fixed in 5.10.0.380, 5.11.0.427, 6.0.0.254, 6.1.0.255, 7.0.0.132, 7.1.0.40, 7.2.0.2
  • Fix · CNA WSO2 Open Banking AM (WSO2) Fixed in 2.0.0.400
  • Fix · CNA WSO2 API Manager (WSO2) Fixed in 3.1.0.351, 3.2.0.455, 4.0.0.375
  • Fix · CNA WSO2 Open Banking IAM (WSO2) Fixed in 2.0.0.420

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-13736
  2. 2026-10-03 Alias added: GHSA-g8w9-p6wx-8fxc

References

Advisory 1

  • TI-2026-04755 Authentication Bypass via JWT Algorithm Mismatch in Multiple WSO2 Products Allows Account Takeover KEVCVSS 3.1CRITICAL 10.0
  • TI-2022-11928 Certain WSO2 products allow unrestricted file upload with resultant remote code execution. KEVCVSS 3.1CRITICAL 9.8
  • TI-2020-15069 The Management Console in WSO2 API Manager through 3.1.0 and API Microgateway 2.2.0… CVSS 3.1CRITICAL 9.1
  • TI-2023-15163 A reflected cross-site scripting (XSS) vulnerability in /authenticationendpoint/login.do… CVSS 3.1MEDIUM 6.1
  • TI-2022-12002 A reflected XSS issue exists in the Management Console of several WSO2 products. CVSS 3.1MEDIUM 6.1
  • TI-2025-13722 Account Takeover via Conditional Authentication Script Logic in Multiple WSO2 Products CVSS 3.1CRITICAL 9.4
See all 94 →

Sources

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