CVE-2021-47973: Sticky-Notes Sticky Notes Widget

High severity, CVSS 7.5. EPSS: 0.3% chance of exploitation in the next 30 days.

Sticky Notes Widget 3.0.6 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 on iOS devices.

Affected products

• Sticky-Notes Sticky Notes Widget: version 3.0.6 only

Published 2026-05-16. Last modified 2026-06-17.