CVE-2021-47857

MEDIUM

Moodle 3.10.3 - 'label' Persistent Cross Site Scripting

Title source: CVE List
Search associated code STIX 2.1 vulnerability STIX 2.1 with PoCs

Record summary

CVE-2021-47857 has a selected CVSS score of 5.1 (medium); EIP currently links 1 catalogued exploit.

Description

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.

Description source: CVE List

Exploitation context

Available material

Catalogued exploits
1

CISA SSVC decision

ExploitationPoC
AutomatableNo
Technical impactPartial

CISA Coordinator · SSVC 2.0.3 · Evaluated Jan 22, 2026 · Source: CVE List

Affected products and versions

1
ProductSourceVersion range

Moodle

Browse Moodle / Moodle
CVE List3.10.3affected

Proofs of concept

1

Catalogued exploits

ExploitDBMoodle 3.10.3 - 'label' Persistent Cross Site ScriptingExploitDB exploitby Vincent666Not analyzed1 file
ExploitDB
PoC details

References

4