Description
The self-registration flow accepts user-supplied input for usernames without adequately preventing the disclosure of username existence. When a user attempts to register with an existing username, the system responds with an error message that explicitly indicates the username is already in use. This behavior allows an attacker to discover valid usernames within the system. The discovery of valid usernames can facilitate subsequent attacks such as brute force, social engineering, and targeted phishing campaigns.
CVSS breakdown
CVSS 3.1
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None
Affected products
- WSO2 / WSO2 API Control Plane0 – 4.5.0
- WSO2 / WSO2 API Control Plane4.5.0 – 4.5.0.56
- WSO2 / WSO2 API Control Plane4.6.0 – 4.6.0.18
- WSO2 / WSO2 API Manager3.2.0 – 3.2.0.478
- WSO2 / WSO2 API Manager3.2.1 – 3.2.1.96
- WSO2 / WSO2 API Manager4.0.0 – 4.0.0.379
- WSO2 / WSO2 API Manager4.1.0 – 4.1.0.262
- WSO2 / WSO2 API Manager4.2.0 – 4.2.0.200
- WSO2 / WSO2 API Manager4.3.0 – 4.3.0.112
- WSO2 / WSO2 API Manager4.4.0 – 4.4.0.72
- WSO2 / WSO2 API Manager4.5.0 – 4.5.0.55
- WSO2 / WSO2 API Manager4.6.0 – 4.6.0.17
- WSO2 / WSO2 API Manager0 – 3.1.0
- WSO2 / WSO2 API Manager3.1.0 – 3.1.0.354
- WSO2 / WSO2 API Manager3.2.0 – 3.2.0.458
- WSO2 / WSO2 Carbon Identity Application Authentication Frameworkx – *
- WSO2 / WSO2 Carbon Identity Application Authentication Framework5.18.187 – 5.18.187.330
- WSO2 / WSO2 Carbon Identity Application Authentication Framework5.17.5 – 5.17.5.332
- WSO2 / WSO2 Carbon Identity Management Endpoint Util5.25.92 – 5.25.92.167
- WSO2 / WSO2 Carbon Identity Management Endpoint Util5.17.5 – 5.17.5.332
- WSO2 / WSO2 Carbon Identity Management Endpoint Util5.18.187 – 5.18.187.330
- WSO2 / WSO2 Carbon Identity Management Endpoint Util5.23.8 – 5.23.8.213
- WSO2 / WSO2 Carbon Identity Management Endpoint Util7.0.78 – 7.0.78.162
- WSO2 / WSO2 Carbon Identity Management Endpoint Utilx – *
- WSO2 / WSO2 Identity Server6.0.0 – 6.0.0.257
- WSO2 / WSO2 Identity Server6.1.0 – 6.1.0.234
- WSO2 / WSO2 Identity Server6.1.0 – 6.1.0.257
- WSO2 / WSO2 Identity Server7.0.0 – 7.0.0.133
- WSO2 / WSO2 Identity Server7.1.0 – 7.1.0.41
- WSO2 / WSO2 Identity Server7.2.0 – 7.2.0.3
- WSO2 / WSO2 Identity Server0 – 5.10.0
- WSO2 / WSO2 Identity Server5.10.0 – 5.10.0.383
- WSO2 / WSO2 Identity Server5.11.0 – 5.11.0.430
- WSO2 / WSO2 Identity Server as Key Manager0 – 5.10.0
- WSO2 / WSO2 Identity Server as Key Manager5.10.0 – 5.10.0.374
- WSO2 / WSO2 Open Banking AM2.0.0 – 2.0.0.403
- WSO2 / WSO2 Open Banking AM0 – 2.0.0
- WSO2 / WSO2 Open Banking IAM2.0.0 – 2.0.0.423
- WSO2 / WSO2 Open Banking IAM0 – 2.0.0
- WSO2 / WSO2 Traffic Manager0 – 4.5.0
- WSO2 / WSO2 Traffic Manager4.5.0 – 4.5.0.54
- WSO2 / WSO2 Traffic Manager4.6.0 – 4.6.0.17
- WSO2 / WSO2 Universal Gateway4.5.0 – 4.5.0.55
- WSO2 / WSO2 Universal Gateway4.6.0 – 4.6.0.17
- WSO2 / WSO2 Universal Gateway0 – 4.5.0
Updated 15m ago · 8 sources