Vulnerability record · CVE-2021-39136 · published 25 August 2021

CVE-2021-39136: Basercms cross-site scripting vulnerability

Basercms · Basercms

baserCMS is an open source content management system with a focus on Japanese language support. In affected versions there is a cross-site scripting vulnerability in the file upload function of the management system of baserCMS. Users are advised to update as soon as possible. No workaround are available to mitigate this issue.

5.4 CVSS 3.1 Medium EPSS 0.93% · top 40.8% CWE-79 · Cross-site scripting

5.4CVSS 3.1 base score, v2 3.5

0.93%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

8References

17 Jun 2026Last modified by NVD

Description

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Basercms Basercms

References

Link	Tags
http://jvn.jp/en/jp/JVN14134801/index.html	Third Party Advisory
https://basercms.net/security/JVN_14134801	Vendor Advisory
https://github.com/baserproject/basercms/commit/568d4cab5ba1cdee7bbf0133c676d02a98f6d7bc	PatchThird Party Advisory
https://github.com/baserproject/basercms/security/advisories/GHSA-hgjr-632x-qpp3	Third Party Advisory
http://jvn.jp/en/jp/JVN14134801/index.html	Third Party Advisory
https://basercms.net/security/JVN_14134801	Vendor Advisory
https://github.com/baserproject/basercms/commit/568d4cab5ba1cdee7bbf0133c676d02a98f6d7bc	PatchThird Party Advisory
https://github.com/baserproject/basercms/security/advisories/GHSA-hgjr-632x-qpp3	Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-39136), CISA KEV, FIRST EPSS (scores of 2026-10-02). This page is refreshed as NVD updates the record.