CVE-2021-20683

Name: CVE-2021-20683
Creator: NVD / NIST
Published: 2021-03-26T09:15:12.167+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.73%

Last modified Jun 17, 2026

CVE-2021-20683 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. Improper neutralization of JavaScript input in the blog article editing function of baserCMS versions prior to 4.4.5 allows remote authenticated attackers to inject an arbitrary script via unspecified vectors.. EPSS estimates a 0.73% chance of exploitation in the next 30 days.

Description

Improper neutralization of JavaScript input in the blog article editing function of baserCMS versions prior to 4.4.5 allows remote authenticated attackers to inject an arbitrary script via unspecified vectors.

Metrics

CVSS 3.1

5.4/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

0.73%

49.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Basercms	Basercms	< 4.4.5

References

https://basercms.net/security/JVN64869876Patch, Vendor Advisory
https://jvn.jp/en/jp/JVN64869876/index.htmlThird Party Advisory
https://basercms.net/security/JVN64869876Patch, Vendor Advisory
https://jvn.jp/en/jp/JVN64869876/index.htmlThird Party Advisory

Timeline

Published: Mar 26, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-20683?

How severe is CVE-2021-20683?

CVE-2021-20683 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.73% probability of exploitation in the next 30 days.

How do I fix CVE-2021-20683?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-20683?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST