Two of Mozilla’s Cross Reference sub-domains suffer from a cross-site scripting (XSS) vulnerability, according to Wang Jing, a mathematics PhD student from School of Physical and Mathematical Science, Nanyang Technological University, Singapore.
Mozilla are dealing with the vulnerabilities.
Wang said “This means all URLs under the above two domains can be used for XSS attacks targeting Mozilla’s users,”
A reflected XSS attack is typically delivered via email or a neutral web site. The bait is an innocent-looking URL, pointing to a trusted site but containing the XSS vector. If the trusted site is vulnerable to the vector, clicking the link can cause the victim's browser to execute the injected script.