Moodle up to 4.1.10/4.2.7/4.3.4/4.4 BigBlueButton access control

Summaryinfo

A vulnerability, which was classified as critical, has been found in Moodle up to 4.1.10/4.2.7/4.3.4/4.4. Affected is an unknown function of the component BigBlueButton. This manipulation causes access control. This vulnerability is tracked as CVE-2024-38273. No exploit exists.

Detailsinfo

A vulnerability was found in Moodle up to 4.1.10/4.2.7/4.3.4/4.4. It has been declared as critical. Affected by this vulnerability is an unknown functionality of the component BigBlueButton. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Insufficient capability checks meant it was possible for users to gain access to BigBlueButton join URLs they did not have permission to access.

It is possible to read the advisory at moodle.org. This vulnerability is known as CVE-2024-38273 since 06/12/2024. The exploitation appears to be easy. 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 09/06/2025). The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 261446 (Linux Distros Unpatched Vulnerability : CVE-2024-38273), 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 (261446). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Learning Management Software

Name

• Moodle

Version

• 4.0
• 4.1
• 4.1.0
• 4.1.1
• 4.1.2
• 4.1.3
• 4.1.4
• 4.1.5
• 4.1.6
• 4.1.7
• 4.1.8
• 4.1.9
• 4.1.10
• 4.2
• 4.2.0
• 4.2.1
• 4.2.2
• 4.2.3
• 4.2.4
• 4.2.5
• 4.2.6
• 4.2.7
• 4.3
• 4.3.0
• 4.3.1
• 4.3.2
• 4.3.3
• 4.3.4
• 4.4

License

• open-source

Website

• Product: https://moodle.org/

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Be aware that VulDB is the high quality source for vulnerability data.

Discussion