Medium severity · published Jul 5, 2018
CVE-2018-3764
In Nextcloud Contacts before 2.1.2, a missing sanitization of search results for an autocomplete field could lead to a stored XSS requiring user-interaction
4.8
CVSS
0.6%
EPSS
No
On KEV
Description
In Nextcloud Contacts before 2.1.2, a missing sanitization of search results for an autocomplete field could lead to a stored XSS requiring user-interaction. The missing sanitization only affected group names, hence malicious search results could only be crafted by privileged users like admins or group admins.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 51% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CO
Contacts · Nextcloud
before 2.1.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-3764
CVE.org
https://www.cve.org/CVERecord?id=CVE-2018-3764
Vendor Advisory
https://nextcloud.com/security/advisory/?id=nc-sa-2018-005
More from Contacts
5.4
CVE-2025-66554
Contacts app for Nextcloud easily syncs contacts from various devices with your Nextcloud and allows editing
5.4
CVE-2021-39221
Nextcloud is an open-source, self-hosted productivity platform
5.4
CVE-2020-8281
A missing file type check in Nextcloud Contacts 3.3.0 allows a malicious user to upload malicious SVG files to perform cross-site scripting (XSS) attacks
5.4
CVE-2020-8280
A missing file type check in Nextcloud Contacts 3.4.0 allows a malicious user to upload SVG files as PNG files to perform cross-site scripting (XSS) attacks
4.3
CVE-2023-33182
Contacts app for Nextcloud easily syncs contacts from various devices with your Nextcloud and allows editing