GoogleOSV:GHSA-382V-GXJ9-FFHCMoodle uses predictable password-recovery tokens
lib/moodlelib.php 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 relies on the PHP mt_rand function to implement the random_string and complex_random_string functions, which makes it easier for remote attackers to predict password-recovery tokens via a brute-force approach.
References
git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-50860
www.openwall.com/lists/oss-security/2015/09/21/1
github.com/moodle/moodle
github.com/moodle/moodle/commit/289bc7f9e3022918b4cfd2cc9851472f0cea2896
github.com/moodle/moodle/commit/5337b2295237958c93b6c65fa595859aaa7bf257
github.com/moodle/moodle/commit/6e8224365ffcdf328458ea7852dc62574e806119
github.com/moodle/moodle/commit/e4ac3879c2d1f8fe66caa74ff1544248bccef61e
moodle.org/mod/forum/discuss.php?d=320291
nvd.nist.gov/vuln/detail/CVE-2015-5267
web.archive.org/web/20160323063809/www.securitytracker.com/id/1033619
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