#VU18899 Reflected cross-site scripting in Custom 404 Pro
Published: June 25, 2019 / Updated: June 25, 2019
Vulnerability identifier: #VU18899
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:P/U:Clear
CVE-ID: N/A
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Custom 404 Pro
Custom 404 Pro
Software vendor:
Kunal Nagar
Kunal Nagar
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 the "s" HTTP GET parameter. 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.
PoC:
/wp-admin/admin.php?page=c4p-main&s="><svg/onload=alert(/XSS/)>Remediation
Install updates from vendor's website.