What is CVE-2021-47970?

CVE-2021-47970 is a high-severity vulnerability in Macaron Notes, classified under CWE-789. CVSS score: 7.5/10. Published 2026-05-16.

How severe is CVE-2021-47970?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Macaron Notes

CVE-2021-47970

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 a…

EPSS: 0.001 (16.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Macaron Notes — versions 5.5
Macaron-notes-great-notebook Macaron Notes Gear Notebook — versions 5.5

Weakness classification (CWE)

CWE-789

References

ExploitDB-49953 (exploit)
VulnCheck Advisory: Macaron Notes 5.5 Denial of Service via Buffer Overflow (third-party-advisory)

Frequently asked questions

What is CVE-2021-47970?: CVE-2021-47970 is a high-severity vulnerability in Macaron Notes, classified under CWE-789. CVSS score: 7.5/10. Published 2026-05-16.
How severe is CVE-2021-47970?: High severity. CVSS v3 base score is 7.5 out of 10.