Cross-site scripting in Chat Anywhere - CVE-2018-20524

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Main Vulnerability Database Vulnerabilities #VU36264

Cross-site scripting in Chat Anywhere - CVE-2018-20524

Published: December 27, 2018 / Updated: August 8, 2020


Vulnerability identifier: #VU36264
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear
CVE-ID: CVE-2018-20524
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: LionMax Software
Affected software:
Chat Anywhere

Detailed vulnerability description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks via crafted use of <<a> in a message, because a danmuWrapper DIV element in chatbox-onlydanmu.js is outside the scope of a Content Security Policy (CSP).

The vulnerability exists due to insufficient sanitization of user-supplied data. 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-2018-20524

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Sources