Username Enumeration in Multiple WSO2 Products with Multi-Attribute Login Enabled
Summary
| CVE | CVE-2025-1396 |
|---|---|
| State | PUBLISHED |
| Assigner | WSO2 |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2025-09-26 08:15:38 UTC |
| Updated | 2026-06-17 08:39:03 UTC |
| Description | A username enumeration vulnerability exists in multiple WSO2 products when Multi-Attribute Login is enabled. In this configuration, the system returns a distinct "User does not exist" error message to the login form, regardless of the validate_username setting. This behavior allows malicious actors to determine which usernames exist in the system based on observable discrepancies in the application's responses. Exploitation of this vulnerability could aid in brute-force attacks, targeted phishing campaigns, or other social engineering techniques by confirming the validity of user identifiers within the system. |
Risk And Classification
Primary CVSS: v3.1 5.3 MEDIUM from [email protected]
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
EPSS: 0.002510000 probability, percentile 0.152910000 (date 2026-10-18)
Problem Types: CWE-203 | CWE-203 CWE-203 Observable Discrepancy
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Primary | 5.3 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
| 3.1 | ed10eef1-636d-4fbe-9993-6890dfa878f8 | Secondary | 3.7 | LOW | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N |
| 3.1 | CNA | CVSS | 3.7 | LOW | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
LowIntegrity
NoneAvailability
NoneCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Application | Wso2 | Identity Server | 5.10.0 | All | All | All |
| Application | Wso2 | Identity Server | 5.11.0 | All | All | All |
| Application | Wso2 | Identity Server | 6.0.0 | All | All | All |
| Application | Wso2 | Identity Server | 6.1.0 | All | All | All |
| Application | Wso2 | Identity Server As Key Manager | 5.10.0 | All | All | All |
| Application | Wso2 | Open Banking Iam | 2.0.0 | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | WSO2 | WSO2 Identity Server | unknown 5.10.0 custom | Not specified |
| CNA | WSO2 | WSO2 Identity Server | affected 5.10.0 5.10.0.346 custom | Not specified |
| CNA | WSO2 | WSO2 Identity Server | affected 5.11.0 5.11.0.395 custom | Not specified |
| CNA | WSO2 | WSO2 Identity Server | affected 6.0.0 6.0.0.231 custom | Not specified |
| CNA | WSO2 | WSO2 Identity Server | affected 6.1.0 6.1.0.223 custom | Not specified |
| CNA | WSO2 | WSO2 Open Banking IAM | affected 2.0.0 2.0.0.390 custom | Not specified |
| CNA | WSO2 | WSO2 Identity Server As Key Manager | affected 5.10.0 5.10.0.339 custom | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| security.docs.wso2.com/en/latest/security-announcements/security-advisories/2025/WSO... | ed10eef1-636d-4fbe-9993-6890dfa878f8 | security.docs.wso2.com | Vendor Advisory |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
Additional Advisory Data
Solutions
CNA: Follow the instructions given on https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2025/WSO2-2025-3983/#solution https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2025/WSO2-2025-3983/#solution
There are currently no legacy QID mappings associated with this CVE.