This security bulletin contains one low risk vulnerability.
Exploit availability: NoDescription
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 within the $_SERVER["PHP_SELF"] value in the ~/phpexcel/PHPExcel/Shared/JAMA/docs/download.php file. 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.Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.Vulnerable software versions
RSVPmaker Excel: 1.1
Can this vulnerability be exploited remotely?
Is there known malware, which exploits this vulnerability?