CVE-2025-5802
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.
- Score
- CVSS 3.1 5.3 Medium
- Status
- Deferred - ed10eef1-636d-4fbe-9993-6890dfa878f8
- Published
- 2026-09-15
- Last modified
- 2026-09-15
- Weaknesses
- CWE-203
Affected products
- Wso2 Api Control Plane (Wso2)
- Wso2 Api Manager (Wso2)
- Wso2 Carbon Identity Application Authentication Framework (Wso2)
- Wso2 Carbon Identity Management Endpoint Util (Wso2)
- Wso2 Identity Server (Wso2)
- Wso2 Identity Server As Key Manager (Wso2)
- Wso2 Open Banking Am (Wso2)
- Wso2 Open Banking Iam (Wso2)
- Wso2 Traffic Manager (Wso2)
- Wso2 Universal Gateway (Wso2)
References
- https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2025-4227/
