Authorization bypass through user-controlled key in Nextcloud Circles - CVE-2021-37630
Published: September 7, 2021
Vulnerability identifier: #VU56367
CSH Severity: Medium
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-37630
CWE-ID: CWE-639
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to the Secret Circle can be joined without approval. A remote authenticated attacker can join any Secret Circle without approval by the Circle owner.
Affected software
Nextcloud Circles
How to mitigate CVE-2021-37630
Install updates from vendor's website.
Nextcloud Circles - addressed in versions 0.19.15, 0.20.11, 0.21.4