CVE-2021-47971

HighCVSS 7.5/10Last modified Jun 17, 2026

Description

My Notes Safe 5.3 contains a denial of service vulnerability that allows attackers to crash the application by pasting excessively long character strings into note fields. Attackers can generate a payload containing 350000 repeated characters and paste it twice into a new note to trigger an application crash.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-789

Affected software

No affected versions have been published.

Timeline

Published
May 16, 2026
Last modified
Jun 17, 2026
NVD status
Deferred

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CVE-2021-47971: High severity, CVSS 7.5 | Vulnix