What’s Vulnerable › Vulnerabilities

CVE-2025-4296: Open Redirect in HotelRunner's B2B

• Severity: medium (CVSS 4.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-07-23 · updated 2026-06-17
• Weakness: CWE-601

Description

URL Redirection to Untrusted Site ('Open Redirect') vulnerability in HotelRunner B2B allows Forceful Browsing. This issue affects B2B: before 04.06.2025.

Affected products

• HotelRunner B2B: before 04.06.2025 — fixed in 04.06.2025

How to fix

Upgrade to a fixed version: HotelRunner B2B 04.06.2025. Check the vendor advisory for mitigations.

References

• https://siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-25-0169
• https://www.usom.gov.tr/bildirim/tr-25-0169

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