What is the severity of CVE-2021-40100?

The severity of CVE-2021-40100 is considered medium due to the potential impact of stored XSS.

How do I fix CVE-2021-40100?

To fix CVE-2021-40100, upgrade Concrete CMS to version 8.5.6 or later.

What causes the vulnerability in CVE-2021-40100?

CVE-2021-40100 is caused by improper validation of user input in the Active Conversation Editor when set to Rich Text.

What are the potential impacts of CVE-2021-40100?

The potential impacts of CVE-2021-40100 include unauthorized script execution and potential account compromise.

Who is affected by CVE-2021-40100?

CVE-2021-40100 affects users of Concrete CMS versions up to and including 8.5.5.

Vulnerability/
CVE-2021-40100

medium

5.4

CWE

24/9/2021

4/8/2024

CVE-2021-40100: XSS

First published: Fri Sep 24 2021(Updated: )

An issue was discovered in Concrete CMS through 8.5.5. Stored XSS can occur in Conversations when the Active Conversation Editor is set to Rich Text.

Credit: cve@mitre.org

Affected Software	Affected Version	How to fix
Concrete5	<=8.5.5

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Reference Links

Frequently Asked Questions

What is the severity of CVE-2021-40100?
The severity of CVE-2021-40100 is considered medium due to the potential impact of stored XSS.
How do I fix CVE-2021-40100?
To fix CVE-2021-40100, upgrade Concrete CMS to version 8.5.6 or later.
What causes the vulnerability in CVE-2021-40100?
CVE-2021-40100 is caused by improper validation of user input in the Active Conversation Editor when set to Rich Text.
What are the potential impacts of CVE-2021-40100?
The potential impacts of CVE-2021-40100 include unauthorized script execution and potential account compromise.
Who is affected by CVE-2021-40100?
CVE-2021-40100 affects users of Concrete CMS versions up to and including 8.5.5.

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source/MITRE
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agent/first-publish-date
agent/description
agent/event
agent/source
agent/softwarecombine
agent/weakness
agent/tags
collector/nvd-index
agent/software-canonical-lookup-request
vendor/concretecms
canonical/concrete5
version/concrete5/8.5.5

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Frequently Asked Questions

What is the severity of CVE-2021-40100?
The severity of CVE-2021-40100 is considered medium due to the potential impact of stored XSS.
How do I fix CVE-2021-40100?
To fix CVE-2021-40100, upgrade Concrete CMS to version 8.5.6 or later.
What causes the vulnerability in CVE-2021-40100?
CVE-2021-40100 is caused by improper validation of user input in the Active Conversation Editor when set to Rich Text.
What are the potential impacts of CVE-2021-40100?
The potential impacts of CVE-2021-40100 include unauthorized script execution and potential account compromise.
Who is affected by CVE-2021-40100?
CVE-2021-40100 affects users of Concrete CMS versions up to and including 8.5.5.