Security Advisory

Missing sanitization in iOS App allows XSS (NC-SA-2020-003)

20th November 2019

Risk level: Low

CVSS v3 Base Score: 3.5 (AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N)

CWE: Improper Encoding or Escaping of Output (CWE-116)

HackerOne report: 575562

Description

Missing sanitization in the iOS App 2.24.4 causes an XSS when opening malicious HTML files.

Affected Software

• Nextcloud Ios < 2.25.0 (CVE-2019-15614)

Action Taken

The error has been fixed.

Resolution

It is recommended that the iOS App is upgraded to 2.25.0.

Acknowledgements

The Nextcloud team thanks the following people for their research and responsible disclosure of the above advisory:

• noobsec (root@noobsec.org) - Vulnerability discovery and disclosure.
• Wannarat C. / MisterHuntz - Vulnerability discovery and disclosure.

This advisory is licensed CC BY-SA 4.0.