Vulnerability · Published Sep 26, 2025 · Assigned by WSO2
CVE-2025-1396Username Enumeration in Multiple WSO2 Products with Multi-Attribute Login Enabled
Low 3.7
In plain English
A low-severity security flaw in WSO2 Identity Server from WSO2. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 17% of all known vulnerabilities).
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Maven | org.wso2.carbon.identity.framework:org.wso2.carbon.identity.input.validation.mgt | no fix listed | GHSA-w82p-r9vw-4rg5 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| WSO2 | WSO2 Identity Server | 5.10.0 – before 5.10.0.3465.11.0 – before 5.11.0.3956.0.0 – before 6.0.0.2316.1.0 – before 6.1.0.223 |
| WSO2 | WSO2 Open Banking IAM | 2.0.0 – before 2.0.0.390 |
| WSO2 | WSO2 Identity Server as Key Manager | 5.10.0 – before 5.10.0.339 |
Weakness: CWE-203 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N