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 and paste it into a note field to trigger application crash and stop functionality.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.003 (18.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 19th percentile — 18.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Macaron Notes — versions 5.5
- Macaron-Notes-Great-Notebook Macaron Notes Gear Notebook — versions 5.5
Weakness classification (CWE)
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.