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CVE Vulnerability Details :
CVE-2021-47971
PUBLISHED
More InfoOfficial Page
Assigner-VulnCheck
Assigner Org ID-83251b91-4cc7-4094-a5c7-464a1b83ea10
View Known Exploited Vulnerability (KEV) details
Published At-16 May, 2026 | 15:26
Updated At-18 May, 2026 | 18:50
Rejected At-
▼CVE Numbering Authority (CNA)
My Notes Safe 5.3 Denial of Service via Buffer Overflow

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.

Affected Products
Vendor
my-notes-safe
Product
My Notes Safe
Versions
Affected
  • 5.3
Problem Types
TypeCWE IDDescription
CWECWE-789Memory Allocation with Excessive Size Value
Type: CWE
CWE ID: CWE-789
Description: Memory Allocation with Excessive Size Value
Metrics
VersionBase scoreBase severityVector
4.08.7HIGH
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
3.17.5HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Version: 4.0
Base score: 8.7
Base severity: HIGH
Vector:
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
Version: 3.1
Base score: 7.5
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
finder
Geovanni Ruiz
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://www.exploit-db.com/exploits/49954
exploit
https://www.vulncheck.com/advisories/my-notes-safe-denial-of-service-via-buffer-overflow
third-party-advisory
Hyperlink: https://www.exploit-db.com/exploits/49954
Resource:
exploit
Hyperlink: https://www.vulncheck.com/advisories/my-notes-safe-denial-of-service-via-buffer-overflow
Resource:
third-party-advisory
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Details not found