What is CVE-2021-30086?

CVE-2021-30086 is a medium-severity vulnerability in Kindsoft Kindeditor, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-09-28.

How severe is CVE-2021-30086?

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

XSS in Kindsoft Kindeditor

CVE-2021-30086

Cross Site Scripting (XSS) vulnerability exists in KindEditor (Chinese versions) 4.1.12, which can be exploited by an attacker to obtain user cookie information.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2021-09-28 · 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: 0.007 (50.8th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 50.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Kindsoft Kindeditor — versions 4.1.12

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/kindsoft/kindeditor/ (Product, Third Party Advisory)
www.cnvd.org.cn/flaw/show/3257066 (Third Party Advisory)

Frequently asked questions

What is CVE-2021-30086?: CVE-2021-30086 is a medium-severity vulnerability in Kindsoft Kindeditor, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-09-28.
How severe is CVE-2021-30086?: Medium severity. CVSS v3 base score is 6.1 out of 10.