Quick answers
- Is CVE-2025-4295 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2025-4295 being exploited in the wild.
- How severe is CVE-2025-4295?
- Medium severity, with a CVSS score of 4.6, published 22 July 2025.
- Which products and versions are affected?
- HotelRunner B2B before 04.06.2025.
- Is there a fix for CVE-2025-4295?
- A patch was published on 2025-06-04: Issue fixed in versions from this date onwards Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2025-4295 attacked?
- It is attacked over the network, in a hosted service.
- Am I affected by CVE-2025-4295?
- Check whether you run HotelRunner B2B at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A vulnerability exists in HotelRunner B2B due to CWE-297 (Improper Validation of Certificate with Host Mismatch). This flaw allows for HTTP Response Splitting, a technique where an attacker can inject control characters into HTTP headers to split a single response into two. The attack vector is network-based and requires low privileges (PR:L) and user interaction (UI:R). By exploiting this, an attacker can potentially perform cross-site scripting (XSS), cache poisoning, or session hijacking. The issue is addressed in versions released on or after June 4, 2025.
Affected products
- HotelRunner B2B before 04.06.2025
Timeline
- 2025-07-22: advisory: NVD publication date
- 2025-06-04: patched: Issue fixed in versions from this date onwards