{"id":"BIT-moodle-2021-47857","summary":"Moodle 3.10.3 - 'label' Persistent Cross Site Scripting","details":"Moodle 3.10.3 contains a persistent cross-site scripting vulnerability in the calendar event subtitle field that allows attackers to inject malicious scripts. Attackers can craft a calendar event with malicious JavaScript in the subtitle track label to execute arbitrary code when users view the event.","aliases":["CVE-2021-47857"],"modified":"2026-09-10T16:01:43.396995373Z","published":"2026-03-06T08:46:28.845Z","database_specific":{"severity":"High","cpes":["cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*"]},"references":[{"type":"WEB","url":"https://moodle.org/"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-47857"},{"type":"ADVISORY","url":"https://www.exploit-db.com/exploits/49714"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/moodle-label-persistent-cross-site-scripting"}],"affected":[{"package":{"name":"moodle","ecosystem":"Bitnami","purl":"pkg:bitnami/moodle"},"ranges":[{"type":"SEMVER","events":[{"introduced":"3.10.3"},{"last_affected":"3.10.3"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/moodle/BIT-moodle-2021-47857.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N"}]}],"schema_version":"1.9.0"}