Tuleap does not sanitize properly user inputs when constructing SQL queries for a tracker report when a criteria is a cross reference or a permissions on artifact field.
Impact
An attacker with access to a tracker report with a cross references criteria could execute arbitrary SQL queries.
CVSSv3 score: 8.8 (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Exploitation
Put the character ' into the cross reference criteria of a tracker report, you will get a DB error caused by the resulting broken query.
References
CWE-89
https://www.owasp.org/index.php/SQL_Injection