CVE-2025-24391

Possible user enumeration

Published Jul 14, 2025 CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed
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

Remediation

Vendor Solution

Update to OTRS 2025.6.1. or later. Please note that there will be no OTRS 7 patches

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-21322 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
History
Type Values Removed Values Added
First Time appeared Otrs
Otrs otrs
Vendors & Products Otrs
Otrs otrs
Type Values Removed Values Added
Metrics epss

{'score': 0.00028}

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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
Title Possible user enumeration
Weaknesses CWE-203
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
OTRS
Published
Updated
Jul 14, 2025, 12:58 PM
Reserved
Jan 21, 2025, 9:09 AM
Status
Deferred
Published
Jul 14, 2025, 9:15 AM
Modified
Jun 17, 2026, 8:58 AM