Vulnerability Database

322,732

Total vulnerabilities in the database

CVE-2021-47857

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.

  • Published: Jan 21, 2026
  • Updated: Jan 22, 2026
  • CVE: CVE-2021-47857
  • Severity: High
  • Exploit:

CVSS v3:

  • Severity: High
  • Score: 7.2
  • AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

CWEs:

OWASP TOP 10:

No affected software listed.