Provide references for CVE-2020-15239.
Where can I find more information about CVE-2020-15239?
References are available at: https://github.com/horazont/xmpp-http-upload/security/advisories/GHSA-hwv5-w8gm-fq9f, https://github.com/horazont/xmpp-http-upload/pull/12, https://github.com/horazont/xmpp-http-upload/commit/82056540191e89f0cd697c81f57714c00962ed75, https://pypi.org/project/xmpp-http-upload/#history.