CVE-2021-20745

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-06-28 · updated 2026-06-17
Weakness: CWE-78

Description

Inkdrop versions prior to v5.3.1 allows an attacker to execute arbitrary OS commands on the system where it runs by loading a file or code snippet containing an invalid iframe into Inkdrop.

Affected products

Takuya Matsuyama Inkdrop: before 5.3.1 — fixed in 5.3.1

How to fix

Upgrade to a fixed version: Takuya Matsuyama Inkdrop 5.3.1. Check the vendor advisory for mitigations.

References

https://docs.inkdrop.app/releases/5.3.1
https://jvn.jp/en/jp/JVN29949691/index.html
https://www.inkdrop.app/
https://docs.inkdrop.app/releases/5.3.1
https://jvn.jp/en/jp/JVN29949691/index.html
https://www.inkdrop.app/

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