Cross-site scripting in Nextcloud Server - CVE-2017-0893
Published: May 8, 2017 / Updated: July 18, 2020
Vulnerability identifier: #VU31420
CSH Severity: Low
CVSS v4: 2.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: CVE-2017-0893
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote authenticated user to read and manipulate data.
Nextcloud Server before 9.0.58 and 10.0.5 and 11.0.3 are shipping a vulnerable JavaScript library for sanitizing untrusted user-input which suffered from a XSS vulnerability caused by a behaviour change in Safari 10.1 and 10.2. Note that Nextcloud employs a strict Content-Security-Policy preventing exploitation of this XSS issue on modern web browsers.
Affected software
Nextcloud Server
How to mitigate CVE-2017-0893
Install update from vendor's website.
Nextcloud Server - update to 11.0.3