What’s Vulnerable › Vulnerabilities

CVE-2021-47969: Color Notes 1.4 Denial of Service via Long Character String

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-16 · updated 2026-06-17
• Weakness: CWE-789

Description

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.

Affected products

• color-notes Color Notes: 1.4

References

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

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