Description
Nextcloud Server is a self hosted personal cloud system. In Nextcloud Server prior to 31.0.10 and 32.0.1 and Nextcloud Enterprise Server prior to 28.0.14.11, 29.0.16.8, 30.0.17.3, and 31.0.10, contacts search allowed to retrieve personal data of other users (emails, names, identifiers) without proper access control. This allows an authenticated user to retrieve information about accounts that are not related or added as contacts.
Affected products
nextcloud: nextcloud server
References3
- github.com/nextcloud/security-advisories/security/advisories/GH… PatchVendor Advisory
- github.com/nextcloud/server/commit/e4866860cbf24a746eb8a1255872… Patch
- github.com/nextcloud/server/pull/55657 Issue Tracking
Metrics
- CVSS 3.1
-
4.9
MEDIUM
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N - EPSS — exploit probability
- 0% percentile: 33 · as of 11 November 2026
- CWE
- CWE-359
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.