#VU21323 OS Command Injection in vBulletin - CVE-2019-16759
Published: September 25, 2019 / Updated: June 17, 2021
Vulnerability identifier: #VU21323
Vulnerability risk: High
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Amber
CVE-ID: CVE-2019-16759
CWE-ID: CWE-78
Exploitation vector: Remote access
Exploit availability:
The vulnerability is being exploited in the wild
Vulnerable software:
vBulletin
vBulletin
Software vendor:
vBulletin
vBulletin
Description
The vulnerability allows a remote attacker to execute arbitrary shell commands on the target system.
The vulnerability exists due to improper input validation in "ajax/render/widget_php" when processing data passed via the "widgetConfig[code]" HTTP POST parameter. A remote unauthenticated attacker can send specially crafted HTTP POST request to the affected application and execute arbitrary OS commands on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Note: The vulnerability is being actively exploited in the wild.
Remediation
Install updates from vendor's website.