CVE•Published 2026-05-16•Modified 2026-05-18•0 articles on news•6 live references•NVD data
CVE-2021-47970
Vulnerability data via NVD (ingested)
CVSS v3.1
7.5
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS percentile
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Weaknesses (CWE)
Description
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.
Timeline
Published 2026-05-16
Modified 2026-05-18
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
More intel sources (5)
Shodan report
vuln:CVE-2021-47970Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2021-47970Censys host search filtered to this CVE id.
grep.app
CVE-2021-47970Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2021-47970GitHub code search for direct mentions.
Google dork
"CVE-2021-47970" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2021-47970 on GitHub.
We haven't classified any articles referencing CVE-2021-47970 yet. The external references above still apply.