An issue was discovered in Linaro LAVA before 2018.5.post1. Because of support for URLs in the submit page, a user can forge an HTTP request that will force lava-server-gunicorn to return any file on the server that is readable by lavaserver and valid yaml.
https://www.debian.org/security/2018/dsa-4234
https://lists.debian.org/debian-lts-announce/2018/06/msg00011.html
https://git.linaro.org/lava/lava.git/commit/?id=95a9a77b144ced24d7425d6544ab03ca7f6c75d3