Permissions, Privileges, and Access Controls in Nextcloud Server - CVE-2021-32725
Published: July 12, 2021
Vulnerability identifier: #VU54671
CSH Severity: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2021-32725
CWE-ID: CWE-264
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Nextcloud Server
Nextcloud Server
Software vendor:
Nextcloud
Nextcloud
Description
The vulnerability allows a remote attacker to escalate privileges on the system.
The vulnerability exists due to default share permissions are not respected for federated reshares of files and folders, which leads to security restrictions bypass and privilege escalation.
Remediation
Install updates from vendor's website.