CVE-2025-59901 authenticated reflected XSS vulnerability in Sync Breeze Enterprise Server
An authenticated reflected XSS vulnerability allows attackers to steal session information from authenticated users via the monitor_directory endpoint.
- 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-2025-59901?
CVE-2025-59901 is a high-severity cross-site scripting vulnerability in Flexense Disk Pulse Enterprise, published on 28 Jan 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Disk Pulse Enterprise v10.4.18 has an authenticated reflected XSS vulnerability in the '/monitor_directory?sid=' endpoint, caused by insufficient validation of the 'monitor_directory' parameter sent by POST. An attacker could exploit this weakness to send malicious content to an authenticated user and steal information from their session.
Weakness: CWE-352
Which versions are affected by CVE-2025-59901?
How do I fix CVE-2025-59901?
No fix has been published for CVE-2025-59901 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-2025-59901 being exploited?
There is no known exploitation of CVE-2025-59901 in the wild and no public exploit code.
Sources
Also known as GHSA-m9wm-cxxw-876h.