#VU51380 Inconsistent interpretation of HTTP requests in October CMS - CVE-2021-21265
Published: March 10, 2021
Vulnerability identifier: #VU51380
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2021-21265
CWE-ID: CWE-444
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
October CMS
October CMS
Software vendor:
OctoberCMS
OctoberCMS
Description
The vulnerability allows a remote attacker to preform HTTP request smuggling attacks.
The vulnerability exists due to improper validation of HTTP requests. If the server is configured to accept requests with arbitrary HOST header, a remote attacker can send a specially crafted HTTP request to the server and smuggle arbitrary HTTP headers into the request.
Successful exploitation of vulnerability may allow an attacker to poison HTTP cache and perform phishing attacks.
Remediation
Install updates from vendor's website and configure the CMS to accept only trusted host names.