CVE-2021-47971
My Notes Safe 5.3 Denial of Service via Buffer Overflow
- State
- Published
- Severity
- 8.7 High
- Published
- May 16, 2026
- Updated
- May 18, 2026
- Reserved
- May 16, 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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.7 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | VulnCheck |
Weaknesses
- CWE-789 Memory Allocation with Excessive Size Value
Affected Products
| Product | Versions |
|---|---|
My Notes Safemy-notes-safe |
|
References
- ExploitDB-49954exploit
- VulnCheck Advisory: My Notes Safe 5.3 Denial of Service via Buffer Overflowthird-party-advisory
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