Nextcloud system addressbooks can be modified by malicious trusted server
CVE-2023-35927
What is CVE-2023-35927?
In certain versions of NextCloud Server and NextCloud Enterprise Server, an issue has been identified that allows a malicious server, listed as trusted, to manipulate or erase VCards in the originating server's address book. This misconfiguration may disrupt user experiences by affecting search results and avatar displays. Users attempting to rectify their data may inadvertently restore incorrect entries. Patches for this vulnerability are available in the latest versions, and administrators can implement a workaround by adjusting sharing settings and syncing the address book.
Affected Version(s)
security-advisories Nextcloud Server >= 25.0.0, < 25.0.7 < Nextcloud Server 25.0.0, 25.0.7
security-advisories Nextcloud Server >= 26.0.0, < 26.0.2 < Nextcloud Server 26.0.0, 26.0.2
security-advisories Nextcloud Enterprise Server >= 25.0.0, < 25.0.7 < Nextcloud Enterprise Server 25.0.0, 25.0.7