CVE-2025-4295 Host Header Injection in HotelRunner's B2B
Medium 4.6
Published
Updated
Check this codebase for CVE-2025-4295 and fix it if it is affected.
What it is: CVE-2025-4295 is a medium-severity vulnerability in HotelRunner B2B, published on 22 Jul 2025. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2025-4295 in the wild and no public exploit code.
Affected product: HotelRunner B2B. No package-level version data is available, so check the vendor advisory linked from the reference page.
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2025-4295/ (Markdown: https://insights.sbomify.com/CVE-2025-4295/index.md)
Attackers can exploit improper certificate validation to perform HTTP Response Splitting in HotelRunner B2B.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-4295?
CVE-2025-4295 is a medium-severity vulnerability in HotelRunner B2B, published on 22 Jul 2025. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Improper Validation of Certificate with Host Mismatch vulnerability in HotelRunner B2B allows HTTP Response Splitting.
This issue affects B2B: before 04.06.2025.
Weakness: CWE-297
Which versions are affected by CVE-2025-4295?
How do I fix CVE-2025-4295?
No fix has been published for CVE-2025-4295 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-4295 being exploited?
There is no known exploitation of CVE-2025-4295 in the wild and no public exploit code.
Sources
Also known as GHSA-wwh7-vxvp-9vmx.