SB2020102050 - Dangerous file upload in Nextcloud Contacts
Published: October 20, 2020 Updated: November 27, 2020
Security Bulletin ID
SB2020102050
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Arbitrary file upload (CVE-ID: CVE-2020-8281)
CWE-ID: CWE-434 - Unrestricted Upload of File with Dangerous Type
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote attacker to perform XSS attacks.
The vulnerability exists due to insufficient validation of file during file upload. A remote attacker can upload a malicious SVG file and execute arbitrary HTML code in victim's browser in context of vulnerable website.
Remediation
Install update from vendor's website.