Moodle up to 3.11.3 Calendar Action Event authorization

Summaryinfo

A vulnerability was found in Moodle up to 3.11.3. It has been classified as problematic. Impacted is an unknown function of the component Calendar Action Event Handler. The manipulation leads to authorization. This vulnerability is referenced as CVE-2021-43560. No exploit is available.

Detailsinfo

A vulnerability was found in Moodle up to 3.11.3 (Learning Management Software) and classified as problematic. This issue affects an unknown code block of the component Calendar Action Event Handler. The manipulation with an unknown input leads to a authorization vulnerability. Using CWE to declare the problem leads to CWE-863. The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions. Impacted is confidentiality.

The weakness was published 11/22/2021. It is possible to read the advisory at bugzilla.redhat.com. The identification of this vulnerability is CVE-2021-43560 since 11/09/2021. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 09/04/2025).

The vulnerability scanner Nessus provides a plugin with the ID 261274 (Linux Distros Unpatched Vulnerability : CVE-2021-43560), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (261274). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Learning Management Software

Name

• Moodle

Version

• 3.0
• 3.1
• 3.2
• 3.3
• 3.4
• 3.5
• 3.6
• 3.7
• 3.8
• 3.9
• 3.9.0
• 3.9.1
• 3.9.2
• 3.9.3
• 3.9.4
• 3.9.5
• 3.9.6
• 3.9.7
• 3.9.8
• 3.9.9
• 3.9.10
• 3.10
• 3.10.0
• 3.10.1
• 3.10.2
• 3.10.3
• 3.10.4
• 3.10.5
• 3.10.6
• 3.10.7
• 3.11
• 3.11.0
• 3.11.1
• 3.11.2
• 3.11.3

License

• open-source

Website

• Product: https://moodle.org/

CPE 2.3info

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CPE 2.2info

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Entryinfo

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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