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    CVE-2021-34667

    The Calendar_plugin WordPress plugin is vulnerable to Reflected Cross-Site Scripting due to the use of `$_SERVER['PHP_SELF']` in the ~/calendar.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 1.0.

    Published:Aug 16, 2021
    Last Modified:May 5, 2025
    EPS:Aug 16, 2021
    EPSS Score:0.0021
    CVSS Score:6.1

    Affected Products

    Vendor
    Calendar Plugin Project
    Product
    Calendar Plugin

    Exploits

    https://plugins.trac.wordpress.org/browser/calendar-plugin/trunk/calendar.php#L86https://www.wordfence.com/vulnerability-advisories/#CVE-2021-34667https://plugins.trac.wordpress.org/browser/calendar-plugin/trunk/calendar.php#L86https://www.wordfence.com/vulnerability-advisories/#CVE-2021-34667

    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