Medium severity6.1NVD Advisory· Published May 24, 2021· Updated Jun 17, 2026

CVE-2021-20725

Description

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Calendar01 Project/Calendar01
cpe:2.3:a:calendar01_project:calendar01:*:*:*:*:free:*:*:*
Range: <=1.0.1
Calendar01/Calendar01llm-create
Range: <=1.0.1
PHP Factory/[Calendar01] free editionv5
Range: ver1.0.1 and earlier

Patches

Vulnerability mechanics

References

jvn.jp/en/jp/JVN53910556/index.htmlnvdThird Party Advisory
www.php-factory.net/calendar/01.phpnvdProductThird Party Advisory

News mentions

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cvss	0.397
epss	0.001
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000