CVE-2025-59891 Cross-Site request forgery (CSRF) vulnerability in Sync Breeze Enterprise Server

High 8.5 Published 28 Jan 2026 Updated 28 Jan 2026

An attacker can trick authenticated users into changing passwords or creating accounts via CSRF, leading to account takeover or privilege escalation.

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-2025-59891?

CVE-2025-59891 is a high-severity 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

Cross-Site request forgery (CSRF) vulnerability in Sync Breeze Enterprise Server v10.4.18 and Disk Pulse Enterprise v10.4.18. An authenticated user could cause another user to perform unwanted actions within the application they are logged into. This vulnerability is possible due to the lack of proper CSRF token implementation. Among other things, it is possible, using a POST request to change a user's password or create users via '/setup_login?sid=', affecting the 'username', 'password', and 'cpassword' parameters.

Weakness: CWE-352

Which versions are affected by CVE-2025-59891?

It affects 2 products.

Products include Flexense Diskpulse, Flexense Syncbreeze.

How do I fix CVE-2025-59891?

No fix has been published for CVE-2025-59891 yet. Limit exposure of the affected software until one is available.

Is CVE-2025-59891 being exploited?

There is no known exploitation of CVE-2025-59891 in the wild and no public exploit code.

Sources

Also known as GHSA-33r4-r5rc-phcf.