CVE-2025-4294 XSS in HotelRunner's B2B
An attacker can inject malicious scripts into HotelRunner B2B web pages, potentially stealing user data or hijacking sessions.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-4294?
CVE-2025-4294 is a medium-severity cross-site scripting vulnerability in HotelRunner B2B, published on 22 Jul 2025. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in HotelRunner B2B allows Cross-Site Scripting (XSS).
This issue affects B2B: before 04.06.2025.
Weakness: CWE-79
Which versions are affected by CVE-2025-4294?
How do I fix CVE-2025-4294?
No fix has been published for CVE-2025-4294 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2025-4294 being exploited?
There is no known exploitation of CVE-2025-4294 in the wild and no public exploit code.
Sources
Also known as GHSA-gphf-mppm-mv89.