Code Injection in Smarty - CVE-2021-26120
Published: February 23, 2021
Vulnerability identifier: #VU50870
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:P/U:Green
CVE-ID: CVE-2021-26120
CWE-ID: CWE-94
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vendor: smarty.php.net
Affected software:
Smarty
Smarty
Detailed vulnerability description
The vulnerability allows a remote user to execute arbitrary PHP code on the target system.
The vulnerability exists due to improper input validation when processing data passed via an unexpected function name after a "{function name=" substring. A remote user can send a specially crafted request 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-2021-26120
Install updates from vendor's website.