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CVE-2021-39136

Cross-site scripting vulnerability in file upload

MEDIUM
5.4
CVSS Score
Published: August 25, 2021 at 06:05 PM UTC
Updated: June 17, 2026 at 04:03 AM UTC
2 products affected across 2 vendorsBasercmsBasercms

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Severity
MEDIUM5.4
Exploit prediction
EPSS 0.9%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Basercms· Basercms
95%
v < 4.5.1
Affected range stops below 4.5.1, so it looks safe — our inference, not a vendor statement
Basercms· Baserprojectcomposer
60%
v < 4.5.1
Affected range stops below 4.5.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (4)

Third Party Advisoryx_refsource_JVN
Source: [email protected]
http://jvn.jp/en/jp/JVN14134801/index.html
x_refsource_MISCVendor Advisory
Source: [email protected]
https://basercms.net/security/JVN_14134801
x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/baserproject/basercms/commit/568d4cab5ba1cdee7bbf0133c676d02a98f6d7bc
x_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://github.com/baserproject/basercms/security/advisories/GHSA-hgjr-632x-qpp3

CVSS

5.4MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-79

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