CVE-2025-4295: Hotelrunner b2b

Medium severity, CVSS 4.6. EPSS: 0.1% chance of exploitation in the next 30 days.

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

Affected products

• Hotelrunner b2b: before 04.06.2025 (fixed in 04.06.2025)

Published 2025-07-22. Last modified 2026-06-17.