KonaWiki2 versions prior to 2.2.4 allows a remote attacker to upload arbitrary files via unspecified vectors.

published 2021-05-20 5y ago modified 2026-06-17 4mo ago also EUVD-2021-8135

cvss: 9.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.5%; EPSS 1.5% chance of exploitation in 30 days, percentile 74%
public exploits: 0; none known

KonaWiki2 versions prior to 2.2.4 allows a remote attacker to upload arbitrary files via unspecified vectors. If the file contains PHP scripts, arbitrary code may be executed.

Patch / fix

fixed in 1

kujirahand konawiki 2.2.4

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Exploit prediction

1.52% chance of exploitation in the next 30 days, higher than 74% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	7.5	AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

kujirahand KonaWiki2

Classification

Weakness

CWE-434 Unrestricted Upload of File with Dangerous Type

References

kujirahand.com /konawiki/
vendor-advisory
jvn.jp /en/jp/JVN34232719/index.html
third-party-advisory

Sources

CVE List CVE-2021-20721
NVD CVE-2021-20721

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