The wiki component in Moodle through 2.6.11, 2.7.x before 2.7.10, 2.8.x before 2.8.8, and 2.9.x before 2.9.2 does not consider the mod/wiki:managefiles capability before authorizing file management, which allows remote authenticated users to delete arbitrary files by using a manage-files button in a text editor.
git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-48371
www.openwall.com/lists/oss-security/2015/09/21/1
github.com/moodle/moodle
github.com/moodle/moodle/commit/037e05e8b266bff4835f0d2eea33ef86fb71d585
github.com/moodle/moodle/commit/1d70050f33edb79b974de2509f18c943969589ea
github.com/moodle/moodle/commit/40a154551fcdf0b9ea906f4d1313df29754f1fa1
github.com/moodle/moodle/commit/78de2e86e8506222cf49b1cc6dc58467750ae83d
moodle.org/mod/forum/discuss.php?d=320289
nvd.nist.gov/vuln/detail/CVE-2015-5265
web.archive.org/web/20160323063809/www.securitytracker.com/id/1033619