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Vulnerabilities

Vulnerability · CVE-2025-4295

Improper Validation of Certificate with Host Mismatch vulnerability in HotelRunner B2B allows HTTP Response Splitting.

Published Jul 22, 2025 · catalog updated Jul 29, 2026 · HotelRunner B2B

Last checked Oct 29, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-4295. EPSS is 0.12%. Act only if a listed version of HotelRunner B2B is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Medium4.6
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.12%
Remediation
Version ranges on file
Affected products
vendor HotelRunner B2B 0 <04.06.2025

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

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor HotelRunner B2B 0 <04.06.20250 <04.06.2025

How to fix CVE-2025-4295

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-4295. EPSS is 0.12%. Act only if a listed version of HotelRunner B2B is installed.

Which versions are affected?

Compare what you have installed with HotelRunner B2B 0 <04.06.2025 0 <04.06.2025. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.12%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jul 22, 2025 · EUVD

    Detected

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

  2. Jul 29, 2026 · EUVD

    Updated

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

Sources

  • CVE.orgVulnerability recordCVE-2025-4295

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-4295

    30-day exploitation probability 0.12%

    first.org
  • EUVDVulnerability recordEUVD-2025-22318

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

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 29, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSOct 29, 2026
  • CVE.orgOct 21, 2026
  • EUVDOct 20, 2026