CVE-2025-24391 Possible user enumeration
Attackers can enumerate valid user accounts via HTTP response differences in the OTRS External Interface, exposing user email addresses.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-24391?
CVE-2025-24391 is a medium-severity vulnerability in OTRS, published on 14 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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
Weakness: CWE-203
Which versions are affected by CVE-2025-24391?
How do I fix CVE-2025-24391?
No fix has been published for CVE-2025-24391 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-24391 being exploited?
There is no known exploitation of CVE-2025-24391 in the wild and no public exploit code.
Sources
Also known as GHSA-fhjw-qvv3-45m7.