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.
Scoring
- Severity
- MEDIUM
- CVSS base score
- 5.3
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- EPSS probability
- 0.25%
- CWE
- CWE-203
- Published
- 2026-09-15
- Last modified
- 2026-09-15
Affected products
- WSO2 WSO2 API Manager
- WSO2 WSO2 API Manager
- WSO2 WSO2 API Manager
- WSO2 WSO2 API Manager
- WSO2 WSO2 API Manager
- WSO2 WSO2 API Manager
- WSO2 WSO2 API Manager
- WSO2 WSO2 API Manager
Weakness type
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