An issue was discovered in ownCloud owncloud/core before 10.13.1. An attacker can access, modify, or delete any file without authentication if the username of a victim is known, and the victim has no signing-key configured. This occurs because pre-signed URLs can be accepted even when no signing-key is configured for the owner of the files. The earliest affected version is 10.6.0.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Owncloud Server | — | Upgrade ownCloud Server to the latest version | Sep 7, 2026 | Nov 21, 2023 |
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