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TI-2018-02760 Aliases CVE-2018-3764GHSA-hcc2-pgmx-p7rw

Cross-site scripting in Nextcloud Contacts application

Priority LOW 23CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-79.

Summary

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.

Why it matters now

EPSS 0.00642 51st percentileScored 2026-11-07
Fix Fixed Nextcloud Contacts application (Nextcloud): 2.1.2

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
nextcloudNextcloud Contacts applicationbefore 2.1.22.1.2Patch availableCNA
  • Nextcloud Contacts application Vendornextcloud Affected before 2.1.2 Fixed in 2.1.2 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:nextcloud:contacts:*:*:*:*:*:*:*:*before 2.1.2Vulnerablenextcloud
  • cpe:2.3:a:nextcloud:contacts:*:*:*:*:*:*:*:* Versions before 2.1.2 Vulnerable ·nextcloud

Remediation

  • Fix · CNA Nextcloud Contacts application (Nextcloud) Fixed in 2.1.2

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-3764
  2. 2026-10-03 Alias added: GHSA-hcc2-pgmx-p7rw
  3. 2026-10-21 EPSS moved to the 50th–90th percentile

References

Advisory 1

  • TI-2021-16606 XSS in Contacts CVSS 3.1MEDIUM 6.4
  • TI-2020-06698 Cross-site scripting in Nextcloud Contacts CVSS 3.1MEDIUM 5.4
  • TI-2020-06697 Cross-site scripting in Nextcloud Contacts CVSS 3.1MEDIUM 5.4
  • TI-2025-40965 Nextcloud Contacts vulnerable to Stored XSS in contacts app via organisation and title field CVSS 3.1MEDIUM 5.4
  • TI-2023-16359 Nextcloud Contacts photos only sanitized if mime type is all lower case CVSS 3.1MEDIUM 4.3
  • TI-2020-06599 A missing file type check in Nextcloud Contacts 3.2.0 allowed a malicious user to upload any file as avatars. CVSS 3.1MEDIUM 4.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences