CVE-2025-53831 DrawIO for ownCloud 10 is vulnerable to Stored XSS
Attackers with DrawIO access can inject malicious scripts via stored XSS, potentially compromising user sessions and data in ownCloud environments.
- 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-2025-53831?
CVE-2025-53831 is a high-severity cross-site scripting vulnerability in DrawIO for ownCloud, published on 6 Jul 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
DrawIO for ownCloud is an application for using DrawIO with the file storage, synchronization, and sharing application ownCloud Classic. In DrawIO for ownCloud prior to version 1.0.2, which corresponds to ownCloud 10 prior to version 10.15.3, attackers with access to the DrawIO app can leverage improper neutralization of input during web page generation to achieve stored XSS. Upgrade ownCloud 10 to version 10.15.3 or later or upgrade DrawIO for ownCloud 10 to version 1.0.2 or later to receive a patch.
Weakness: CWE-79
Which versions are affected by CVE-2025-53831?
How do I fix CVE-2025-53831?
No fix has been published for CVE-2025-53831 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-2025-53831 being exploited?
There is no known exploitation of CVE-2025-53831 in the wild and no public exploit code.