Improper Preservation of Permissions in Nextcloud Server - CVE-2019-15621
Published: February 4, 2020 / Updated: July 17, 2020
Vulnerability identifier: #VU30392
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2019-15621
CWE-ID:
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Nextcloud
Affected software:
Nextcloud Server
Nextcloud Server
Detailed vulnerability description
The vulnerability allows a remote authenticated user to manipulate data.
Improper permissions preservation in Nextcloud Server 16.0.1 causes sharees to be able to reshare with write permissions when sharing the mount point of a share they received, as a public link.
How to mitigate CVE-2019-15621
Install update from vendor's website.