BIT-moodle-2021-47857

vendorUSosv

Moodle 3.10.3 - 'label' Persistent Cross Site Scripting

view advisory published 2026-03-06Licence: per source

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.

describes (1)

Related CVEs.

ID	severity	EPSS	exploitable	published
CVE-2021-47857US	medium6.1	0.38% (32nd)	—	2026-01-21
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…

references

External citations — patches, advisories, analysis.

https://moodle.org/WEB
https://nvd.nist.gov/vuln/detail/CVE-2021-47857WEB
https://www.exploit-db.com/exploits/49714ADVISORY
https://www.vulncheck.com/advisories/moodle-label-persistent-cross-site-scriptingADVISORY

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