Vulnerability in Color-Notes Color Notes
CVE-2021-47969
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.003 (18.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 19th percentile — 18.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Color-Notes Color Notes — versions 1.4
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/49952 (exploit)
- www.vulncheck.com/advisories/color-notes-denial-of-service-via-long-character-s… (third-party-advisory)
Frequently asked questions
- What is CVE-2021-47969?
- CVE-2021-47969 is a high-severity vulnerability in Color-Notes Color Notes, classified under CWE-789. CVSS score: 7.5/10. Published 2026-05-16.
- How severe is CVE-2021-47969?
- High severity. CVSS v3 base score is 7.5 out of 10.