CVE-2021-41279

Zip Slip Vulnerability in BaserCMS

HIGH
8.8
CVSS Score
Published: November 26, 2021 at 06:00 PM UTC
Updated: June 17, 2026 at 04:08 AM UTC
2 products affected across 2 vendorsBasercmsBasercms

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Severity
HIGH8.8
Exploit prediction
EPSS 2%

Description

BaserCMS is an open source content management system with a focus on Japanese language support. In affected versions users with upload privilege may upload crafted zip files capable of path traversal on the host operating system. This is a vulnerability that needs to be addressed when the management system is used by an unspecified number of users. If you are eligible, please update to the new version as soon as possible.

Affected

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

v < 4.5.4
Affected range stops below 4.5.4, so it looks safe — our inference, not a vendor statement
v < 4.5.3
Affected range stops below 4.5.3, 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:

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-22

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