What is the severity of CVE-2021-40691?

CVE-2021-40691 is considered a critical vulnerability due to its potential for session hijacking.

How do I fix CVE-2021-40691?

To mitigate CVE-2021-40691, upgrade to Moodle version 3.11.3, 3.10.7, or 3.9.10.

What systems are affected by CVE-2021-40691?

CVE-2021-40691 affects Moodle versions from 3.9.0 up to 3.11.2 and earlier.

What impact does CVE-2021-40691 have on users?

CVE-2021-40691 allows attackers to hijack active user sessions, compromising user accounts and data.

Is there a workaround for CVE-2021-40691 if I can't upgrade?

There is no known workaround for CVE-2021-40691, and upgrading to the latest version is strongly recommended.

Vulnerability/
CVE-2021-40691

medium

4.3

21/1/2022

30/9/2022

4/8/2024

CVE-2021-40691

First published: Fri Jan 21 2022(Updated: )

A session hijack risk was identified in the Shibboleth authentication plugin.

Credit: secalert@redhat.com secalert@redhat.com

Affected Software	Affected Version	How to fix
composer/moodle/moodle	>=3.11<3.11.3	3.11.3
composer/moodle/moodle	>=3.10<3.10.7	3.10.7
composer/moodle/moodle	>=3.9<3.9.10	3.9.10
Moodle	<3.9.10
Moodle	>=3.10.0<3.10.7
Moodle	>=3.11.0<3.11.3

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Reference Links

Frequently Asked Questions

What is the severity of CVE-2021-40691?
CVE-2021-40691 is considered a critical vulnerability due to its potential for session hijacking.
How do I fix CVE-2021-40691?
To mitigate CVE-2021-40691, upgrade to Moodle version 3.11.3, 3.10.7, or 3.9.10.
What systems are affected by CVE-2021-40691?
CVE-2021-40691 affects Moodle versions from 3.9.0 up to 3.11.2 and earlier.
What impact does CVE-2021-40691 have on users?
CVE-2021-40691 allows attackers to hijack active user sessions, compromising user accounts and data.
Is there a workaround for CVE-2021-40691 if I can't upgrade?
There is no known workaround for CVE-2021-40691, and upgrading to the latest version is strongly recommended.

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collector/github-advisory-latest
source/GitHub
alias/GHSA-92vh-mr2w-j2cr
alias/CVE-2021-40691
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agent/severity
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collector/redhat-bugzilla
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collector/mitre-cve
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agent/trending
agent/source
collector/nvd-cve
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agent/software-canonical-lookup-request
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collector/nvd-index
package-manager/composer
vendor/moodle
canonical/moodle
version/moodle/3.10.0
version/moodle/3.11.0

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Frequently Asked Questions

What is the severity of CVE-2021-40691?
CVE-2021-40691 is considered a critical vulnerability due to its potential for session hijacking.
How do I fix CVE-2021-40691?
To mitigate CVE-2021-40691, upgrade to Moodle version 3.11.3, 3.10.7, or 3.9.10.
What systems are affected by CVE-2021-40691?
CVE-2021-40691 affects Moodle versions from 3.9.0 up to 3.11.2 and earlier.
What impact does CVE-2021-40691 have on users?
CVE-2021-40691 allows attackers to hijack active user sessions, compromising user accounts and data.
Is there a workaround for CVE-2021-40691 if I can't upgrade?
There is no known workaround for CVE-2021-40691, and upgrading to the latest version is strongly recommended.