MantisBT is Vulnerable to Stored XSS in Saved-Filter Owner Column

Incorrect escaping of a saved filter's owner allows an attacker to inject arbitrary HTML on systems where $g_show_user_realname = ON.

Impact

Cross-site scripting (XSS).

Note that By default, only users with Manager access level or above can save their filters publicly

Patches

• 44f490bcf20fd491c1b8f3fc9dd041d8c2a30010

Workarounds

• Prevent display of users' real name (set $g_ show_user_realname = OFF; in configuration)
• Restrict ability to store filters (set $g_stored_query_create_threshold / $g_stored_query_create_shared_threshold to NOBODY

Credits

Thanks to siunam (Tang Cheuk Hei) for discovering and responsibly reporting the issue.