Cross-site scripting in PHP - CVE-2009-5016

CSH
CYBERSECURITY HELP
Sign In REGISTER
 
Main Vulnerability Database Vulnerabilities #VU110281

Cross-site scripting in PHP - CVE-2009-5016

Published: October 30, 2018 / Updated: June 8, 2025


Vulnerability identifier: #VU110281
CSH Severity: Medium
CVSS v4.0:
CVE-ID: CVE-2009-5016
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: PHP Group
Affected software:
PHP

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 data passed via a crafted string that uses overlong UTF-8 encoding, a different vulnerability than CVE-2010-3870. 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-2009-5016

Install update from vendor's website.

Sources