CVE-2021-47971 - CVE House
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Status published High CVE-2021-47971

My Notes Safe 5.3 Denial of Service via Buffer Overflow

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • Geovanni Ruiz

Affected Vendor

my-notes-safe

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Affected Software

My Notes Safe
Vulnerable Versions:
5.3

Timeline

Official Publish: May 16th, 2026
Last Modified: May 18th, 2026
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weaknesses (CWE)

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.