CVE-2021-47970: Macaron Notes

High severity, CVSS 7.5. EPSS: 0.3% chance of exploitation in the next 30 days.

Macaron Notes 5.5 contains a denial of service vulnerability that allows attackers to crash the application by creating notes with excessively long character strings. Attackers can generate a payload containing 350000 repeated characters and paste it into a note field to trigger application crash and stop functionality.

Affected products

• Macaron Notes Macaron Notes: version 5.5 only

Published 2026-05-16. Last modified 2026-06-17.