Detections
Analytics
CVE-2025-66554
low
Description
Contacts app for Nextcloud easily syncs contacts from various devices with your Nextcloud and allows editing. Prior to 5.5.4, 6.0.6, and 7.2.5, a malicious user was able to modify their organisation and title field to load additional CSS files. Javascript and other options were correctly blocked by the content security policy of the Nextcloud Server code. This vulnerability is fixed in 5.5.4, 6.0.6, and 7.2.5.
References
https://hackerone.com/reports/3293290
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-9v78-cpfc-v6h2
https://github.com/nextcloud/contacts/pull/4619
https://github.com/nextcloud/contacts/commit/d954d098978dde1f121600e8b994e02f293c68b1