| Package | Affected versions | Patched versions |
|---|---|---|
| nextcloud server | < 9.0.52 | 9.0.52 |
| owncloud | < 9.0.4 | 9.0.4 |
Nextcloud Server before 9.0.52 & ownCloud Server before 9.0.4 are not properly verifying edit check permissions on WebDAV copy actions. The WebDAV endpoint was not properly checking the permission on a WebDAV COPY action. This allowed an authenticated attacker with access to a read-only share to put new files in there. It was not possible to modify existing files.
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