CVE-2021-39136

Name: CVE-2021-39136
Creator: NVD / NIST
Published: 2021-08-25T18:15:07.177+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.93%

Last modified Jun 17, 2026

CVE-2021-39136 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. 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. EPSS estimates a 0.93% chance of exploitation in the next 30 days.

Description

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.

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

0.93%

56.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Basercms	Basercms	< 4.5.1

References

http://jvn.jp/en/jp/JVN14134801/index.htmlThird Party Advisory
https://basercms.net/security/JVN_14134801Vendor Advisory
https://github.com/baserproject/basercms/commit/568d4cab5ba1cdee7bbf0133c676d02a98f6d7bcPatch, Third Party Advisory
https://github.com/baserproject/basercms/security/advisories/GHSA-hgjr-632x-qpp3Third Party Advisory
http://jvn.jp/en/jp/JVN14134801/index.htmlThird Party Advisory
https://basercms.net/security/JVN_14134801Vendor Advisory
https://github.com/baserproject/basercms/commit/568d4cab5ba1cdee7bbf0133c676d02a98f6d7bcPatch, Third Party Advisory
https://github.com/baserproject/basercms/security/advisories/GHSA-hgjr-632x-qpp3Third Party Advisory

Timeline

Published: Aug 25, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-39136?

How severe is CVE-2021-39136?

CVE-2021-39136 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.93% probability of exploitation in the next 30 days.

How do I fix CVE-2021-39136?

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-2021-39136?

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

Scan your code now

Source: NVD / NIST