CVE-2025-5802
Username Enumeration via Self Registration Flow in Multiple WSO2 Products Allows User Account Discovery
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-203 |
| Vendor | wso2 |
| Product | wso2 api manager |
| Published | Sep 15, 2026 |
| Last Updated | Sep 15, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None
Affected Versions
WSO2 / WSO2 API Manager
3.1.0 < 3.1.0.354 3.2.0 < 3.2.0.458 3.2.0 < 3.2.0.478 3.2.1 < 3.2.1.96 4.0.0 < 4.0.0.379 4.1.0 < 4.1.0.262 4.2.0 < 4.2.0.200 4.3.0 < 4.3.0.112 4.4.0 < 4.4.0.72 4.5.0 < 4.5.0.55 4.6.0 < 4.6.0.17
WSO2 / WSO2 API Control Plane
4.5.0 < 4.5.0.56 4.6.0 < 4.6.0.18
WSO2 / WSO2 Universal Gateway
4.5.0 < 4.5.0.55 4.6.0 < 4.6.0.17
WSO2 / WSO2 Traffic Manager
4.5.0 < 4.5.0.54 4.6.0 < 4.6.0.17
WSO2 / WSO2 Identity Server
5.10.0 < 5.10.0.383 5.11.0 < 5.11.0.430 6.0.0 < 6.0.0.257 6.1.0 < 6.1.0.234 6.1.0 < 6.1.0.257 7.0.0 < 7.0.0.133 7.1.0 < 7.1.0.41 7.2.0 < 7.2.0.3
WSO2 / WSO2 Identity Server as Key Manager
5.10.0 < 5.10.0.374
WSO2 / WSO2 Open Banking AM
2.0.0 < 2.0.0.403
WSO2 / WSO2 Open Banking IAM
2.0.0 < 2.0.0.423
WSO2 / WSO2 Carbon Identity Management Endpoint Util
5.17.5 < 5.17.5.332 5.18.187 < 5.18.187.330 5.23.8 < 5.23.8.213 5.25.92 < 5.25.92.167 7.0.78 < 7.0.78.162
WSO2 / WSO2 Carbon Identity Application Authentication Framework
5.17.5 < 5.17.5.332 5.18.187 < 5.18.187.330