The BackWPup – WordPress Backup Plugin WordPress plugin was affected by a Remote File Inclusion security vulnerability.
packetstormsecurity.com/files/99799/
seclists.org/fulldisclosure/2011/Mar/328
vulners.com/exploitdb/EDB-ID:17056
web.archive.org/web/20191128050912/https://www.senseofsecurity.com.au/sitecontnt/uploads/2015/03/SOS-11-003.pdf
www.openwall.com/lists/oss-security/2011/11/22/10
www.openwall.com/lists/oss-security/2011/11/22/7