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MEDIUM: 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:NDefault status
affected
7.0.x
affected
8.0.x
affected
2023.x
affected
2024.x
affected
2025.x (Patch)
affected
Description
A vulnerability in the External Interface of OTRS allows conclusions to be drawn about the existence of user accounts through different HTTP response codes and messages. This enables an attacker to systematically identify valid email addresses. This issue affects: * OTRS 7.0.X * OTRS 8.0.X * OTRS 2023.X * OTRS 2024.X * OTRS 2025.X
Problem types
CWE-203 Observable Discrepancy
Product status
7.0.x
8.0.x
2023.x
2024.x
2025.x (Patch)
Credits
Special thanks to David Silva for reporting this vulnerability.
References
otrs.com/release-notes/otrs-security-advisory-2025-07/