Tuleap is an Open Source Suite created to facilitate management of software development and collaboration. In Tuleap Community Edition prior to version 16.9.99.1750843170 and Tuleap Enterprise Edition prior to 16.8-4 and 16.9-2, the forgot password form allows for user enumeration. This is fixed in Tuleap Community Edition version 16.9.99.1750843170 and Tuleap Enterprise Edition 16.8-4 and 16.9-2.
https://tuleap.net/plugins/tracker/?aid=43674
https://github.com/Enalean/tuleap/security/advisories/GHSA-xqf3-xxxf-x3c2
https://github.com/Enalean/tuleap/commit/5c72d6d253016d38ed472eb7918f772d074ddb07