Description
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.
CVSS breakdown
CVSS 3.1
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None
Affected products
- wso2 / api_manager3.1.0 – 3.1.0.351
- wso2 / identity_server5.10.0 – 5.10.0.380
- wso2 / identity_server_as_key_manager5.10.0 – 5.10.0.371
- wso2 / open_banking_am2.0.0 – 2.0.0.400
- wso2 / open_banking_iam2.0.0 – 2.0.0.420
- wso2 / WSO2 API Manager0 – 3.1.0
- wso2 / WSO2 API Manager3.1.0 – 3.1.0.351
- wso2 / WSO2 API Manager3.2.0 – 3.2.0.455
- wso2 / WSO2 API Manager4.0.0 – 4.0.0.375
- wso2 / WSO2 Identity Server7.2.0 – 7.2.0.2
- wso2 / WSO2 Identity Server5.10.0 – 5.10.0.380
- wso2 / WSO2 Identity Server0 – 5.10.0
- wso2 / WSO2 Identity Server5.11.0 – 5.11.0.427
- wso2 / WSO2 Identity Server6.0.0 – 6.0.0.254
- wso2 / WSO2 Identity Server6.1.0 – 6.1.0.255
- wso2 / WSO2 Identity Server7.0.0 – 7.0.0.132
- wso2 / WSO2 Identity Server7.1.0 – 7.1.0.40
- wso2 / WSO2 Identity Server as Key Manager0 – 5.10.0
- wso2 / WSO2 Identity Server as Key Manager5.10.0 – 5.10.0.371
- wso2 / WSO2 Open Banking AM2.0.0 – 2.0.0.400
- wso2 / WSO2 Open Banking AM0 – 2.0.0
- wso2 / WSO2 Open Banking IAM2.0.0 – 2.0.0.420
- wso2 / WSO2 Open Banking IAM0 – 2.0.0
Updated 29m ago · 8 sources