PT-2026-41457 · My Notes Safe · My Notes Safe

Geovanni Ruiz · Published 2026-05-16 · Updated 2026-05-16 · CVE-2021-47971

Mitre

CVSS v3.1

7.5

High

Base vector

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

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.

Exploit

Fix

Weakness Enumeration

CWE-789

Related Identifiers

CVE-2021-47971

Affected Products

My Notes Safe

References · 3

• 🔥 https://exploit-db.com/exploits/49954 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-47971 · Security Note
• https://vulncheck.com/advisories/my-notes-safe-denial-of-service-via-buffer-overflow · Note