Provide references for CVE-2021-3874.
Where can I find more information about CVE-2021-3874?
References are available at: https://huntr.dev/bounties/ac268a17-72b5-446f-a09a-9945ef58607a, https://github.com/bookstackapp/bookstack/commit/7224fbcc89f00f2b71644e36bb1b1d96addd1d5a.