Provide references for CVE-2020-5256.
Where can I find more information about CVE-2020-5256?
References are available at: https://github.com/BookStackApp/BookStack/security/advisories/GHSA-g9rq-x4fj-f5hx, https://github.com/BookStackApp/BookStack/releases/tag/v0.25.3, https://github.com/BookStackApp/BookStack/releases/tag/v0.25.4, https://github.com/BookStackApp/BookStack/releases/tag/v0.25.5.