CVE-2025-24391: Possible user enumeration

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-07-14 · updated 2026-06-17
Weakness: CWE-203

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

Affected products

OTRS AG OTRS: from 2025.x through 2025.5.x; 7.0.x, 8.0.x, 2023.x, 2024.x

References

https://otrs.com/release-notes/otrs-security-advisory-2025-07/

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