Authorization bypass through user-controlled key in Nextcloud Richdocuments - CVE-2021-37628
Published: September 7, 2021
Vulnerability identifier: #VU56361
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-37628
CWE-ID:
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 File Drop features ("Upload Only" public link shares in Nextcloud) can be bypassed. A remote attacker can read arbitrary files in such a share.
Affected software
Nextcloud Richdocuments
How to mitigate CVE-2021-37628
Install updates from vendor's website.
Nextcloud Richdocuments - addressed in versions 3.8.4, 4.2.1