Fixed in Apache Tomcat 5.5.21, 5.0.SVN

Low: Cross-site scripting CVE-2007-1358

Web pages that display the Accept-Language header value sent by the client are susceptible to a cross-site scripting attack if they assume the Accept-Language header value conforms to RFC 2616. Under normal circumstances this would not be possible to exploit, however older versions of Flash player were known to allow carefully crafted malicious Flash files to make requests with such custom headers. When generating the response for getLocale() and getLocales(), Tomcat now ignores values for Accept-Language headers that do not conform to RFC 2616. Applications that use the raw header values directly should not assume that the headers conform to RFC 2616 and should filter the values appropriately.

Affects: 5.0.0-5.0.30, 5.5.0-5.5.20