CVE-2025-5802 — Username Enumeration via Self Registration Flow in Multiple WSO2 Products Allows User Account Discovery
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…
Published: 2026-09-15 · CVSS: 5.3 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7