mod/wiki/admin.php in Moodle through 2.4.11, 2.5.x before 2.5.9, 2.6.x before 2.6.6, and 2.7.x before 2.7.3 allows remote authenticated users to remove wiki pages by leveraging delete access within a different subwiki.
git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-47949
openwall.com/lists/oss-security/2014/11/17/11
github.com/moodle/moodle
github.com/moodle/moodle/commit/a481e32f02cdabd2b76aaa06d1d513ffe480e71b
github.com/moodle/moodle/commit/a866ad40beb1c1d7faca2da9c3cbad2dcf6fa32b
github.com/moodle/moodle/commit/dc003ed98e47174a2a4c349f187265a383a386c0
github.com/moodle/moodle/commit/e2a8ac6b1103167d6786cb1801703c2c0f8467ca
moodle.org/mod/forum/discuss.php?d=275163
nvd.nist.gov/vuln/detail/CVE-2014-7837
web.archive.org/web/20150914064838/www.securitytracker.com/id/1031215