Description
mod/forum/post.php in Moodle 2.9.x before 2.9.1 does not consider the mod/forum:canposttomygroups capability before authorizing "Post a copy to all groups" actions, which allows remote authenticated users to bypass intended access restrictions by leveraging per-group authorization.
Remediation
References
Related Vulnerabilities
WordPress Plugin WP Activity Log SQL Injection (4.1.4)
Ruby Integer Overflow or Wraparound Vulnerability (CVE-2008-2663)
PHP Numeric Errors Vulnerability (CVE-2013-4635)
PHP Other Vulnerability (CVE-2016-4540)
Plone CMS Improper Control of Generation of Code ('Code Injection') Vulnerability (CVE-2012-5488)