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Status published
Medium
CVE-2021-34667
Calendar_plugin <= 1.0 Reflected Cross-Site Scripting
Vulnerability Description
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.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:
- p7e4
Affected Vendor
Calendar_plugin
View all reports →Affected Software
Calendar_plugin
Vulnerable Versions:
1.0
Timeline
Official Publish:
August 16th, 2021
Last Modified:
May 5th, 2025
Added to House:
July 21st, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N