What’s Vulnerable › Vulnerabilities

CVE-2021-20721

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-05-20 · updated 2026-06-17
• Weakness: CWE-434

Description

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.

Affected products

• kujirahand KonaWiki: before 2.2.4 — fixed in 2.2.4

How to fix

Upgrade to a fixed version: kujirahand KonaWiki 2.2.4. Check the vendor advisory for mitigations.

References

• https://jvn.jp/en/jp/JVN34232719/index.html
• https://kujirahand.com/konawiki/
• https://jvn.jp/en/jp/JVN34232719/index.html
• https://kujirahand.com/konawiki/

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