GoogleOSV:GHSA-R3FC-HX6Q-G6CQMoodle allows attackers to discover student e-mail addresses
user/index.php in Moodle through 2.6.11, 2.7.x before 2.7.13, 2.8.x before 2.8.11, 2.9.x before 2.9.5, and 3.0.x before 3.0.3 grants excessive authorization on the basis of the moodle/course:viewhiddenuserfields capability, which allows remote authenticated users to discover student e-mail addresses by leveraging the teacher role and reading a Participants list.
References
git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-52433
www.openwall.com/lists/oss-security/2016/03/21/1
github.com/moodle/moodle
github.com/moodle/moodle/commit/089ab60017cd3207990658fbd37f7f31948539fa
github.com/moodle/moodle/commit/094fddd00f2e8e832e21e80f417c7b88b33a1f27
github.com/moodle/moodle/commit/85380c6b616e82e31115fbb585d37f0e15f8b0b2
github.com/moodle/moodle/commit/8e24a54e526c149469bd77c910876c4489e87841
github.com/moodle/moodle/commit/a0034bb01773e36dffed2a665646f9cc31d68d5b
moodle.org/mod/forum/discuss.php?d=330173
nvd.nist.gov/vuln/detail/CVE-2016-2151
web.archive.org/web/20160424224349/www.securitytracker.com/id/1035333
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