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    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
    Last Modified:Mar 5, 2026
    EPS:Jan 21, 2026
    EPSS Score:0.00051
    CVSS Score:7.2

    Affected Products

    Vendor
    Moodle
    Product
    Moodle

    Exploits

    https://www.exploit-db.com/exploits/49714

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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High