How severe is CVE-2025-24391?

CVE-2025-24391 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2025-24391 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-24391?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-24391 have an EU (EUVD) identifier?

Yes. CVE-2025-24391 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-21322.

When was CVE-2025-24391 published?

CVE-2025-24391 was published on 2025-07-14 and last updated on 2026-06-17.

CVE-2025-24391

CVE-2025-24391 is a medium-severity vulnerability with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-203.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (15th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-21322
Weakness: CWE-203
Published: 2025-07-14
Last modified: 2026-06-17

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

Frequently asked questions

What is CVE-2025-24391?: 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
How severe is CVE-2025-24391?: CVE-2025-24391 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2025-24391 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-24391?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-24391 have an EU (EUVD) identifier?: Yes. CVE-2025-24391 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-21322.
When was CVE-2025-24391 published?: CVE-2025-24391 was published on 2025-07-14 and last updated on 2026-06-17.

References

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

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