Cross-site scripting in CMSimple - CVE-2018-19508
Published: December 19, 2018 / Updated: August 8, 2020
Vulnerability identifier: #VU36292
CSH Severity: Low
CVSS v4.0: 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:U/U:Clear
CVE-ID: CVE-2018-19508
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: cmsimple.dk
Affected software:
CMSimple
CMSimple
Detailed vulnerability description
The vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data when processing an admin's upload of an SVG file at a ?userfiles&subdir=userfiles/images/flags/ URI. 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-2018-19508
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.