CVE-2021-20683

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-03-26 · updated 2026-06-17
Weakness: CWE-79

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.

Affected products

baserproject basercms: before 4.4.5 — fixed in 4.4.5

How to fix

Upgrade to a fixed version: baserproject basercms 4.4.5. Check the vendor advisory for mitigations.

References

https://basercms.net/security/JVN64869876
https://jvn.jp/en/jp/JVN64869876/index.html
https://basercms.net/security/JVN64869876
https://jvn.jp/en/jp/JVN64869876/index.html

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