CVE-2021-34667: calendar plugin project calendar plugin

csirt@kutim:~/threat-intel/cve/CVE-2021-34667

CVSS 6.1 · Medium EPSS 0,90%

Kerentanan Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') pada calendar plugin project calendar plugin. Skor CVSS 3.1 6.1 (Medium) menurut NVD.

Deskripsi (NVD)

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.

Rincian

Terbit di NVD: 16 Agustus 2021
Terakhir diubah: 17 Juni 2026
Status NVD: Modified
CVSS 3.1: 6.1 (Medium), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N · uraikan di kalkulator
Jenis kelemahan (CWE): CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
EPSS (30 hari): 0,90% peluang dieksploitasi; lebih tinggi dari 58,4% CVE lain

Produk dan versi terdampak

Vendor	Produk	Versi terdampak
calendar plugin project	calendar plugin	Semua versi hingga 1.0

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

https://plugins.trac.wordpress.org/browser/calendar-plugin/trunk/calendar.php#L86 exploit · advisory pihak ketiga
https://www.wordfence.com/vulnerability-advisories/#CVE-2021-34667 exploit · advisory pihak ketiga

Sumber: NVD · CVE.org · EPSS. Halaman ini disusun otomatis dari data tersebut; pembaruan terakhir 5 Okt 2026, 20:10 WITA. Kalau sistem di Perangkat Daerah memakai produk ini dan butuh bantuan, laporkan lewat kanal pelaporan.