CVE-2025-24391: Otrs AG Otrs

Medium severity, CVSS 5.3. EPSS: 0.3% chance of exploitation in the next 30 days.

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

Affected products

• Otrs AG Otrs: from 7.0, before 7.1 (fixed in 7.1); from 8.0, before 8.1 (fixed in 8.1); from 2023, before 2024 (fixed in 2024); from 2024, before 2025 (fixed in 2025); from 2025, before 2025.6 (fixed in 2025.6)

Published 2025-07-14. Last modified 2026-06-17.