Deserialization of Untrusted Data in concrete5 - CVE-2021-36766
Published: July 20, 2021
Vulnerability identifier: #VU54995
CSH Severity: Medium
CVSS v4.0: 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: CVE-2021-36766
CWE-ID: CWE-502
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: PortlandLabs
Affected software:
concrete5
concrete5
Detailed vulnerability description
The vulnerability allows a remote user to execute arbitrary code on the target system.
The vulnerability exists due to insecure input validation when processing serialized data passed via the "logFile" parameter in the file-based logging feature. A remote privileged user can pass specially crafted data to the application and execute arbitrary PHP code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
How to mitigate CVE-2021-36766
Install updates from vendor's website.