CVE-2021-47971
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
ProductMy Notes Safe
PublishedMay 16, 2026
First seenMay 16, 2026
Weakness typeCWE-789CWE-789
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| my-notes-safe My Notes Safe | 5.3 | — |
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