Path traversal in Nextcloud Server - CVE-2021-41178
Published: October 26, 2021
Vulnerability identifier: #VU57653
CSH Severity: Medium
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-41178
CWE-ID: CWE-22
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform directory traversal attacks.
The vulnerability exists due to input validation error when processing directory traversal sequences. A remote authenticated attacker can send a specially crafted HTTP request and download arbitrary SVG images.
Affected software
Nextcloud Server
How to mitigate CVE-2021-41178
Install update from vendor's website.
Nextcloud Server - addressed in versions 20.0.13, 21.0.5, 22.2.0