XSS Vulnerability in Issue Links and Labels

We have identified and fixed a number of cross-site scripting (XSS) vulnerabilities in JIRA issue links and labels.

Affected versions are 4.2.x to 4.3.x

XSS vulnerabilities potentially allow an attacker to embed their own JavaScript into a JIRA page. You can read more about XSS attacks at various places on the web, including these:

• cgisecurity.com: http://www.cgisecurity.com/articles/xss-faq.shtml
• The Web Application Security Consortium: http://projects.webappsec.org/Cross-Site+Scripting

This issue is reported in our security advisory on this page:

• https://confluence.atlassian.com/display/JIRA/JIRA+Security+Advisory+2011-09-27