CVE-2021-20725

6.1 mediumEPSS 0.8%

Medium (6.1) in calendar01 project calendar01. EPSS 0.8% chance of exploitation in the next 30 days.

Reflected cross-site scripting vulnerability in the admin page of [Calendar01] free edition ver1.0.1 and earlier allows a remote attacker to inject an arbitrary script via unspecified vectors.

Severity

CVSS 3.1

6.1 medium

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

EPSS: 0.8% chance of exploitation in the next 30 days; higher than 55% of CVEs (scores of 2026-10-31)
CWE: CWE-79
Published: 2021-05-24
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

calendar01_project:calendar01

References

https://jvn.jp/en/jp/JVN53910556/index.html
https://www.php-factory.net/calendar/01.php
https://jvn.jp/en/jp/JVN53910556/index.html
https://www.php-factory.net/calendar/01.php

Check your stack JSON