Moodle up to 4.2.1 OAuth 2 Login cross site scripting

Summaryinfo

A vulnerability categorized as problematic has been discovered in Moodle up to 3.9.22/3.11.15/4.0.9/4.1.4/4.2.1. This impacts an unknown function of the component OAuth 2 Login. Executing a manipulation can lead to cross site scripting. This vulnerability is handled as CVE-2023-40320. The attack can be executed remotely. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in Moodle up to 3.9.22/3.11.15/4.0.9/4.1.4/4.2.1 (Learning Management Software). This vulnerability affects an unknown functionality of the component OAuth 2 Login. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity.

The weakness was released 08/31/2023. The advisory is shared for download at moodle.org. This vulnerability was named CVE-2023-40320 since 08/14/2023. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1059.007.

Upgrading to version 3.9.23, 3.11.16, 4.0.10, 4.1.5 or 4.2.2 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.moodle.org. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Type

• Learning Management Software

Name

• Moodle

Version

• 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
• 3.9.11
• 3.9.12
• 3.9.13
• 3.9.14
• 3.9.15
• 3.9.16
• 3.9.17
• 3.9.18
• 3.9.19
• 3.9.20
• 3.9.21
• 3.9.22
• 3.11.0
• 3.11.1
• 3.11.2
• 3.11.3
• 3.11.4
• 3.11.5
• 3.11.6
• 3.11.7
• 3.11.8
• 3.11.9
• 3.11.10
• 3.11.11
• 3.11.12
• 3.11.13
• 3.11.14
• 3.11.15
• 4.0.0
• 4.0.1
• 4.0.2
• 4.0.3
• 4.0.4
• 4.0.5
• 4.0.6
• 4.0.7
• 4.0.8
• 4.0.9
• 4.1.0
• 4.1.1
• 4.1.2
• 4.1.3
• 4.1.4
• 4.2.0
• 4.2.1

License

• open-source

Website

• Product: https://moodle.org/

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