What is CVE-2025-4295?

CVE-2025-4295 is a medium-severity vulnerability in Hotelrunner B2b, classified under Improper Validation of Certificate with Host Mismatch. CVSS score: 4.6/10. Published 2025-07-22.

How severe is CVE-2025-4295?

Medium severity. CVSS v3 base score is 4.6 out of 10.

Vulnerability in Hotelrunner B2b

CVE-2025-4295

Improper Validation of Certificate with Host Mismatch vulnerability in HotelRunner B2B allows HTTP Response Splitting. This issue affects B2B: before 04.06.2025.

Published 2025-07-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.6 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.001 (1.0th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 1st percentile — 1.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000

Affected products

Hotelrunner B2b — versions 0

Weakness classification (CWE)

CWE-297 — Improper Validation of Certificate with Host Mismatch

References

www.usom.gov.tr/bildirim/tr-25-0169 (government-resource, broken-link, third-party-advisory)
siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-25-0169 (government-resource)

Frequently asked questions

What is CVE-2025-4295?: CVE-2025-4295 is a medium-severity vulnerability in Hotelrunner B2b, classified under Improper Validation of Certificate with Host Mismatch. CVSS score: 4.6/10. Published 2025-07-22.
How severe is CVE-2025-4295?: Medium severity. CVSS v3 base score is 4.6 out of 10.