GoogleOSV:GHSA-35PR-GQM6-R366Moodle allows attackers to obtain sensitive personal-contact and unread-message-count information
message/index.php in Moodle through 2.5.9, 2.6.x before 2.6.9, 2.7.x before 2.7.6, and 2.8.x before 2.8.4 does not consider the moodle/site:readallmessages capability before accessing arbitrary conversations, which allows remote authenticated users to obtain sensitive personal-contact and unread-message-count information via a modified URL.
References
git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-49204
openwall.com/lists/oss-security/2015/03/16/1
github.com/moodle/moodle
github.com/moodle/moodle/commit/2924ba1c73f9ed3d525987807f9d289b3eb38154
github.com/moodle/moodle/commit/553319be03c4ef8e62499841c8d5d94c6786ed6d
github.com/moodle/moodle/commit/c35df119a560e22d9e17f833b736b710b96431d9
github.com/moodle/moodle/commit/eb45017b61e35bcab8c35e2c544b1e4144ca1f16
moodle.org/mod/forum/discuss.php?d=307380
nvd.nist.gov/vuln/detail/CVE-2015-2266
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