Description
Moodle 2.9.x before 2.9.3 does not properly check the contact list before authorizing message transmission, which allows remote authenticated users to bypass intended access restrictions and conduct spam attacks via the messaging API.
Remediation
References
Related Vulnerabilities
MySQL CVE-2018-2769 Vulnerability (CVE-2018-2769)
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WordPress 5.1.x Multiple Vulnerabilities (5.1 - 5.1.6)
Jenkins Improper Authentication Vulnerability (CVE-2018-1999045)