What is CVE-2020-28280?

CVE-2020-28280 is a critical-severity vulnerability in Predefine Project. CVSS score: 9.8/10. Published 2020-12-29.

How severe is CVE-2020-28280?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Predefine Project

CVE-2020-28280

Prototype pollution vulnerability in 'predefine' versions 0.0.0 through 0.1.2 allows an attacker to cause a denial of service and may lead to remote code execution.

Published 2020-12-29 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.031 (87.2th percentile), scored 2026-10-03.

Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 87.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.029 · newest: 0.031 · change: +0.001

Affected products

Predefine Project
Predefine — versions 0.0.0, 0.0.1, 0.0.2, 0.0.3, 0.0.4, 0.0.5, 0.1.0, 0.1.1, 0.1.2

References

github.com/bigpipe/predefine/blob/238137e3d1b8288ff5d7529c3cbcdd371888c26b/inde… (Exploit, Third Party Advisory)
www.whitesourcesoftware.com/vulnerability-database/CVE-2020-28280 (Third Party Advisory, Broken Link)

Frequently asked questions

What is CVE-2020-28280?: CVE-2020-28280 is a critical-severity vulnerability in Predefine Project. CVSS score: 9.8/10. Published 2020-12-29.
How severe is CVE-2020-28280?: Critical severity. CVSS v3 base score is 9.8 out of 10.