Is CVE-2025-4296 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2025-4296 being exploited in the wild.

How severe is CVE-2025-4296?

Medium severity, with a CVSS score of 4.7, published 23 July 2025.

Which products and versions are affected?

HotelRunner B2B before 04.06.2025.

Is there a fix for CVE-2025-4296?

A patch was published on 2025-06-04. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2025-4296 attacked?

It is attacked over the network, in a hosted service.

Am I affected by CVE-2025-4296?

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.

CVE-2025-4296: HotelRunner B2B open redirect and forceful browsing

CVE-2025-4296 · Severity: medium · CVSS 4.7 · Published 2025-07-23

HotelRunner B2B, a platform used for business-to-business travel and hospitality management, contains a security flaw that allows attackers to redirect users to malicious websites. By tricking a user into clicking a specially crafted link, an attacker can send them to a fraudulent site that looks legitimate, potentially leading to credential theft or phishing attacks. This vulnerability undermines user trust and can be used as a starting point for more complex social engineering campaigns.

Technologies: HotelRunner B2B. Vendors: HotelRunner.

Quick answers

Is CVE-2025-4296 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2025-4296 being exploited in the wild.
How severe is CVE-2025-4296?: Medium severity, with a CVSS score of 4.7, published 23 July 2025.
Which products and versions are affected?: HotelRunner B2B before 04.06.2025.
Is there a fix for CVE-2025-4296?: A patch was published on 2025-06-04. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2025-4296 attacked?: It is attacked over the network, in a hosted service.
Am I affected by CVE-2025-4296?: 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

An open redirect vulnerability (CWE-601) exists in HotelRunner B2B due to insufficient validation of user-supplied input used in redirection targets. A remote, unauthenticated attacker can exploit this by crafting a URL that, when visited by a legitimate user, redirects them to an arbitrary external domain. This flaw also facilitates 'forceful browsing' techniques. The vulnerability requires minimal user interaction (clicking a link) and is rated with a CVSS score of 4.7. A fix was implemented in the version released on or after June 4, 2025.

Affected products

HotelRunner B2B before 04.06.2025

Timeline

2025-07-23: disclosed
2025-07-23: advisory
2025-06-04: patched

References

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