CVE-2026-61503 Rejetto HFS < 3.2.1 Username Enumeration via Login Response Differences

Rejetto HFS 3.0.0 through 3.2.0 returns observably different responses from its login endpoint depending on whether the submitted username exists. A remote unauthenticated attacker can use this to confirm valid account names, including the default admin account, facilitating password-guessing and...

CVE-2026-61503 Rejetto HFS < 3.2.1 Username Enumeration via Login Response Differences

Rejetto HFS 3.0.0 through 3.2.0 returns observably different responses from its login endpoint depending on whether the submitted username exists. A remote unauthenticated attacker can use this to confirm valid account names, including the default admin account, facilitating password-guessing and...

CVE-2026-24664

The Open eClass platform formerly known as GUnet eClass is a complete course management system. Prior to version 4.2, a username enumeration vulnerability allows unauthenticated attackers to identify valid user accounts by analyzing differences in the login response behavior. This issue has been...

CVE-2026-24664 Open eClass is Vulnerable to Username Enumeration via Login Response Discrepancies

The Open eClass platform formerly known as GUnet eClass is a complete course management system. Prior to version 4.2, a username enumeration vulnerability allows unauthenticated attackers to identify valid user accounts by analyzing differences in the login response behavior. This issue has been...

CVE-2021-29842

IBM WebSphere Application Server 7.0, 8.0, 8.5, 9.0 and Liberty 17.0.0.3 through 21.0.0.9 could allow a remote user to enumerate usernames due to a difference of responses from valid and invalid login attempts. IBM X-Force ID: 205202...