Improper access control in Nextcloud End-to-End Encryption - CVE-2021-22906
Published: June 4, 2021
Vulnerability identifier: #VU53822
CSH Severity: Medium
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-22906
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.
The vulnerability exists due to improper access restrictions. A remote authenticated attacker can lock files of other users and perform a denial of service (DoS) attack.
Affected software
Nextcloud End-to-End Encryption
How to mitigate CVE-2021-22906
Install updates from vendor's website.
Nextcloud End-to-End Encryption - addressed in versions 1.5.3, 1.6.3, 1.7.1