CVE-2025-1396

Username Enumeration in Multiple WSO2 Products with Multi-Attribute Login Enabled

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.

Scores

Weaknesses (CWE)

• CWE-203

Advisories

• GHSA-w82p-r9vw-4rg5 — WSO2's Input Validation Management Service contains Observable Discrepancy when Multi-Attribute Login is enabled

European references

• ENISA EUVD · EUVD-2025-31223
• GCVE · GCVE-0-2025-1396

Affected configurations (NVD CPE)

• cpe:2.3:a:wso2:identity_server:5.10.0:*:*:*:*:*:*:*
• cpe:2.3:a:wso2:identity_server:5.11.0:*:*:*:*:*:*:*
• cpe:2.3:a:wso2:identity_server:6.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:wso2:identity_server:6.1.0:*:*:*:*:*:*:*
• cpe:2.3:a:wso2:identity_server_as_key_manager:5.10.0:*:*:*:*:*:*:*
• cpe:2.3:a:wso2:open_banking_iam:2.0.0:*:*:*:*:*:*:*

Affected products

References

• https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2025/WSO2-2025-3983/

Sources