GHSA-c87j-9rrq-h3j8 Moodle allows attackers to trigger the generation of arbitrary messages

• Packagist moodle/moodle: < 2.5.9 → fixed in 2.5.9 • Packagist moodle/moodle: >= 2.6.0, < 2.6.6 → fixed in 2.6.6 • Packagist moodle/moodle: >= 2.7.0, < 2.7.3 → fixed in 2.7.3

The LTI module in Moodle through 2.4.11, 2.5.x before 2.5.9, 2.6.x before 2.6.6, and 2.7.x before 2.7.3 does not properly restrict the parameters used in a return URL, which allows remote attackers to trigger the generation of arbitrary messages via a modified URL, related to mod/lti/locallib.php and mod/lti/return.php.