CVE-2025-59026 Cross-site scripting in OX App Suite
Attackers can execute script code and exfiltrate sensitive data via malicious file uploads in OX App Suite.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-59026?
CVE-2025-59026 is a medium-severity cross-site scripting vulnerability in Open-Xchange GmbH OX App Suite, published on 27 Nov 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Malicious content uploaded as file can be used to execute script code when following attacker-controlled links. Unintended actions can be executed in the context of the users account, including exfiltration of sensitive information. Please deploy the provided updates and patch releases. No publicly available exploits are known
Weakness: CWE-79
Which versions are affected by CVE-2025-59026?
How do I fix CVE-2025-59026?
No fix has been published for CVE-2025-59026 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-2025-59026 being exploited?
There is no known exploitation of CVE-2025-59026 in the wild and no public exploit code.
Sources
Also known as GHSA-6x9p-798x-gxm4.