Arbitrary file upload in Access Demo Importer - CVE-2021-39317
Published: October 25, 2021
Vulnerability identifier: #VU57633
CSH Severity: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2021-39317
CWE-ID: CWE-434
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Access Demo Importer
Access Demo Importer
Software vendor:
Access Keys
Access Keys
Description
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to insufficient validation of file during file upload in the "plugin_offline_installer_callback" function in the ~/inc/demo-functions.php file. A remote authenticated attacker can upload a malicious file and execute it on the server.
Remediation
Install update from vendor's website.
External links
- https://www.wordfence.com/blog/2021/10/high-severity-vulnerability-patched-in-access-demo-importer-plugin/
- https://plugins.trac.wordpress.org/changeset/2602132/access-demo-importer/trunk/inc/demo-functions.php
- https://plugins.trac.wordpress.org/changeset/2592642/access-demo-importer/trunk/inc/demo-functions.php