Deserialization of Untrusted Data in CMS Made Simple - CVE-2019-9056
Published: October 8, 2019
Vulnerability identifier: #VU21612
CSH Severity: High
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:Amber
CVE-ID: CVE-2019-9056
CWE-ID: CWE-502
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
CMS Made Simple
CMS Made Simple
Software vendor:
cmsmadesimple.org
cmsmadesimple.org
Description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to insecure input validation when processing serialized data in the "FrontEndUsers" module in the "class.FrontEndUsersManipulate.php" or "class.FrontEndUsersManipulator.php" file. A remote authenticated attacker can pass specially crafted data with an untrusted "__FEU__" cookie to the application and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Remediation
Install updates from vendor's website.