CVE-2025-66554 — Nextcloud Contacts vulnerable to Stored XSS in contacts app via organisation and title field
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 modi…
Published: 2025-12-05 · CVSS: 3.5 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7