#VU28769 Cross-site scripting in October CMS - CVE-2020-11083
Published: June 6, 2020 / Updated: July 15, 2020
Vulnerability identifier: #VU28769
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:P/U:Clear
CVE-ID: CVE-2020-11083
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
October CMS
October CMS
Software vendor:
OctoberCMS
OctoberCMS
Description
The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data in the FormWidget. A remote authenticated user with access to the FormWidget (backend.allow_unsafe_markdown permission) can inject and execute arbitrary HTML and script code in user's browser in context of vulnerable website.
Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.
Remediation
Install updates from vendor's website.