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**Name of the Vulnerable Software and Affected Versions** Nextcloud Server versions prior to 9.0.54 Nextcloud Server versions prior to 10.0.1 ownCloud Server versions prior to 9.0.6 ownCloud Server versions prior to 9.1.2 **Description** The issue concerns content spoofing in the dav app, where the exception message displayed on the DAV endpoints, such as "/api/dav", contained partially user-controllable input. This could lead to a potential misrepresentation of information. **Recommendations** For Nextcloud Server versions prior to 9.0.54, update to version 9.0.54 or later. For Nextcloud Server versions prior to 10.0.1, update to version 10.0.1 or later. For ownCloud Server versions prior to 9.0.6, update to version 9.0.6 or later. For ownCloud Server versions prior to 9.1.2, update to version 9.1.2 or later.