CVE-2021-47969

HIGH 7.5

Color Notes 1.4 Denial of Service via Long Character String

CVSS Score

7.5

EPSS Score

0.0%

EPSS Percentile

0th

Color Notes 1.4 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 350,000 repeated characters and paste it twice into a new note to cause the application to stop responding.

CWE	CWE-789
Vendor	color-notes
Product	color notes
Published	May 16, 2026

Stay Ahead of the Next One

Get instant alerts for color-notes color notes

Be the first to know when new high vulnerabilities affecting color-notes color notes are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

color-notes / Color Notes

1.4

References

NVD ↗ CVE.org ↗ EPSS Data ↗

exploit-db.com: https://www.exploit-db.com/exploits/49952 vulncheck.com: https://www.vulncheck.com/advisories/color-notes-denial-of-service-via-long-character-string

Credits

Geovanni Ruiz