#VU24369 Cross-site scripting in Chained Quiz - CVE-2020-7104
Published: January 17, 2020
Vulnerability identifier: #VU24369
Vulnerability risk: Low
CVSSv4.0: 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-2020-7104
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Chained Quiz
Chained Quiz
Software vendor:
Kiboko Labs
Kiboko Labs
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 "total_questions" POST parameter in the "models/quiz.php" file when a user completes a quiz. 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.
Example:
$output = str_replace('{{questions}}', $_POST['total_questions'], $output); Remediation
Install updates from vendor's website.