CVE-2021-47857 — HIGH (7.2)

Vulnerability 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.

CVSS Score

7.2

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality

LOW

Integrity

LOW

Availability

NONE

Affected Products

Vendor	Product	Versions
Moodle	Moodle	3.10.3

Related Weaknesses (CWE)

CWE-79

References

https://moodle.org/Product
https://www.exploit-db.com/exploits/49714ExploitThird Party AdvisoryVDB Entry
https://www.vulncheck.com/advisories/moodle-label-persistent-cross-site-scriptinThird Party Advisory

FAQ

What is CVE-2021-47857?

CVE-2021-47857 is a vulnerability with a CVSS score of 7.2 (HIGH). 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...

How severe is CVE-2021-47857?

CVE-2021-47857 has been rated HIGH with a CVSS base score of 7.2/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-47857?

Check the references section above for vendor advisories and patch information. Affected products include: Moodle Moodle.