The vulnerability was exploited against eBay customers in March 2009.
Advisory: SB2009030401 - XSS in Mozilla Firefox
Vulnerable component: Mozilla Firefox
CVSSv3 score: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:F/RL:O/RC:C
CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
The vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient validation of user-supplied input when processing XBL bindings. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in userтАЩs 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.Note: the vulnerability was being actively exploited.