How severe is CVE-2021-42227?

CVE-2021-42227 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-42227 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-42227?

CVE-2021-42227 affects Kindsoft Kindeditor. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-42227?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-42227 published?

CVE-2021-42227 was published on 2021-10-14 and last updated on 2026-06-17.

CVE-2021-42227

CVE-2021-42227 is a medium-severity vulnerability in Kindsoft Kindeditor with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (56th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Kindsoft Kindeditor
Published: 2021-10-14
Last modified: 2026-06-17

Description

Cross SIte Scripting (XSS) vulnerability exists in KindEditor 4.1.x via a Google search inurl:/examples/uploadbutton.html and then the .html file on the website that uses this editor (the file suffix is allowed).

Frequently asked questions

What is CVE-2021-42227?: Cross SIte Scripting (XSS) vulnerability exists in KindEditor 4.1.x via a Google search inurl:/examples/uploadbutton.html and then the .html file on the website that uses this editor (the file suffix is allowed).
How severe is CVE-2021-42227?: CVE-2021-42227 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-42227 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-42227?: CVE-2021-42227 affects Kindsoft Kindeditor. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-42227?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-42227 published?: CVE-2021-42227 was published on 2021-10-14 and last updated on 2026-06-17.

References

https://github.com/kindsoft/kindeditor/issues/336

Affected products (1)

cpe:2.3:a:kindsoft:kindeditor:*:*:*:*:*:*:*:*

More vulnerabilities in Kindsoft Kindeditor

CVE-2021-42228 — High (CVSS 8.8): A Cross Site Request Forgery (CSRF) vulnerability exists in KindEditor 4.1.x, as demonstrated by…
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CVE-2021-37267 — Medium (CVSS 6.1): Cross Site Scripting (XSS) vulnerability exists in all versions of KindEditor, which can be exploited by an attacker to…
CVE-2021-30086 — Medium (CVSS 6.1): Cross Site Scripting (XSS) vulnerability exists in KindEditor (Chinese versions) 4.1.12, which can be exploited by an…
CVE-2019-7543 — Medium (CVSS 6.1): In KindEditor 4.1.11, the php/demo.php content1 parameter has a reflected Cross-site Scripting (XSS) vulnerability.
CVE-2017-1002024 — Medium (CVSS 4.3): Vulnerability in web application Kind Editor v4.1.12, kindeditor/php/upload_json.php does not check authentication…

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