Cross-site scripting in CMS Made Simple - CVE-2017-16798
Published: November 12, 2017 / Updated: August 8, 2020
Vulnerability identifier: #VU37983
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear
CVE-ID: CVE-2017-16798
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: cmsmadesimple.org
Affected software:
CMS Made Simple
CMS Made Simple
Detailed vulnerability 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 passed via "In CMS Made Simple 2.2.3.1, the is_file_acceptable function" when .phtml, .pht, .html, or .svg. A remote attacker can trick the victim to follow a specially crafted link 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.
How to mitigate CVE-2017-16798
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.