A vulnerability and a weakness have been reported in Flyspray, which can be exploited by malicious people to conduct cross-site scripting attacks or identify valid user accounts.

1) Input passed via the "item_summary" parameter to "index.php?do=details" is not properly sanitised before being returned to the user. This can be exploited to execute arbitrary HTML and script code in a user's browser session in context of an affected site.

2) The weakness is caused due to different error messages being returned depending on whether an unsuccessful login attempt is performed with a valid or invalid username. This can be exploited to facilitate brute force attacks and obtain valid usernames.

The vulnerability and the weakness are reported in version 0.9.9.4. Other versions may also be affected.

Solution
Update to version 0.9.9.5, which fixes vulnerability #1.
Further details available to Secunia VIM customers

Provided and/or discovered by
Digital Security Research Group

Changelog
Further details available to Secunia VIM customers

Original Advisory
Flyspray:
http://flyspray.org/fsa:3

Deep Links
Links available to Secunia VIM customers