CVE-2025-53831: ownCloud Drawio For ownCloud

High severity, CVSS 8.2. EPSS: 0.3% chance of exploitation in the next 30 days.

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.

Affected products

• ownCloud Drawio For ownCloud: before 1.0.2 (fixed in 1.0.2)
• ownCloud ownCloud 10: before 10.15.3 (fixed in 10.15.3)

Published 2026-07-06. Last modified 2026-09-29.