What is CVE-2021-40898?

CVE-2021-40898 is a high-severity vulnerability in Scaffold-Helper Project, classified under Inefficient Regular Expression Complexity. CVSS score: 7.5/10. Published 2022-06-27.

How severe is CVE-2021-40898?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Scaffold-Helper Project

CVE-2021-40898

A Regular Expression Denial of Service (ReDOS) vulnerability was discovered in scaffold-helper v1.2.0 when copying crafted invalid files.

Vulnerability class: ReDoS (Regular Expression Denial of Service)

Published 2022-06-27 · last modified 2026-06-17.

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: 0.011 (63.1th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 63rd percentile — 63.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.011 · change: +0.000

Affected products

Scaffold-Helper Project — versions 1.2.0

Weakness classification (CWE)

CWE-1333 — Inefficient Regular Expression Complexity

References

github.com/yetingli/SaveResults/blob/main/js/scaffold-helper.js (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-40898?: CVE-2021-40898 is a high-severity vulnerability in Scaffold-Helper Project, classified under Inefficient Regular Expression Complexity. CVSS score: 7.5/10. Published 2022-06-27.
How severe is CVE-2021-40898?: High severity. CVSS v3 base score is 7.5 out of 10.