Moodle authorization issue vulnerability

Vulnerabilities related to authorization issues exist in Moodle versions 4.2.0 through 4.5.15, 5.0.0 through 5.0.11, 5.1.0 through 5.1.8, 5.2.0 through 5.2.4, and 5.3.0. These vulnerabilities stem from a lack of permission checks in the coregradesgetgradeitems web service. Authenticated course...