Tuleap is a tool for end to end traceability of application and system developments. Prior to Tuleap Community Edition 15.13.99.40, Tuleap Enterprise Edition 15.13-3, and Tuleap Enterprise Edition 15.12-6, users might receive email notification with information they should not have access to. Tuleap Community Edition 15.13.99.40, Tuleap Enterprise Edition 15.13-3, and Tuleap Enterprise Edition 15.12-6 fix this issue.
https://tuleap.net/plugins/tracker/?aid=39686
https://github.com/Enalean/tuleap/security/advisories/GHSA-g76g-hc92-96xw