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Cross-site scripting vulnerability in file upload

High severity GitHub Reviewed Published Aug 25, 2021 in baserproject/basercms • Updated Feb 1, 2023

Package

composer baserproject/basercms (Composer)

Affected versions

<= 4.5.0

Patched versions

4.5.1

Description

There is a cross-site scripting vulnerability in file upload on the management system of baserCMS.

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.

Target

baserCMS 4.5.1 and earlier versions

Vulnerability

Execution of malicious JavaScript code may alter the display of the page or leak cookie information.

Countermeasures

Update to the latest version of baserCMS

Please refer to the next page for details.
https://basercms.net/security/JVN_14134801

References

@ryuring ryuring published to baserproject/basercms Aug 25, 2021
Published by the National Vulnerability Database Aug 25, 2021
Reviewed Aug 26, 2021
Published to the GitHub Advisory Database Aug 30, 2021
Last updated Feb 1, 2023

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

EPSS score

0.077%
(34th percentile)

Weaknesses

CVE ID

CVE-2021-39136

GHSA ID

GHSA-hgjr-632x-qpp3

Source code

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