What is CVE-2021-20619?

CVE-2021-20619 is a medium-severity vulnerability in Weseek Growi, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-01-19.

How severe is CVE-2021-20619?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Weseek Growi

CVE-2021-20619

Cross-site scripting vulnerability in GROWI (v4.2 Series) versions prior to v4.2.3 allows remote attackers to inject an arbitrary script via unspecified vectors.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2021-01-19 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.010 (62.7th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 63rd percentile — 62.7% 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: 0.010 · change: 0.000

Affected products

Weseek Growi
Weseek, Inc. Growi V4.2 Series — versions versions prior to v4.2.3

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/weseek/growi (Product, Third Party Advisory)
weseek.co.jp/security/2021/01/18/vulnerability/growi-prevent-xss4/ (Vendor Advisory)
jvn.jp/en/jp/JVN57544707/index.html (Third Party Advisory)

Frequently asked questions

What is CVE-2021-20619?: CVE-2021-20619 is a medium-severity vulnerability in Weseek Growi, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-01-19.
How severe is CVE-2021-20619?: Medium severity. CVSS v3 base score is 6.1 out of 10.