#VU23684 Input validation error in Backdrop CMS
Published: December 19, 2019
Vulnerability identifier: #VU23684
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: N/A
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Backdrop CMS
Backdrop CMS
Software vendor:
Backdrop CMS
Backdrop CMS
Description
The vulnerability allows a remote attacker to compromise the affected website.
The vulnerability exists due to insufficient validation of user-supplied archives. A remote authenticated user can upload a specially crafted archive and execute arbitrary code on the server.
This issue is mitigated by the fact that the attacker would be required to have the "Synchronize, import, and export configuration" permission, a permission that only trusted administrators should be given.
Remediation
Install updates from vendor's website.