CVE-2025-53829: ownCloud 10

High severity, CVSS 8.0. EPSS: 0.5% chance of exploitation in the next 30 days.

ownCloud is a file storage, synchronization, and sharing application. In ownCloud 10 prior to version 10.15.3, an attacker with administrative privileges can exploit a path traversal vulnerability in the system to execute arbitrary code. Upgrade ownCloud 10 to version 10.15.3 or later to receive a patch.

Affected products

• ownCloud ownCloud 10: before 10.15.3 (fixed in 10.15.3)

Published 2026-07-06. Last modified 2026-10-06.