Moodle up to 4.1.17/4.3.11/4.4.7/4.5.3 Messaging Web Service authorization

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Moodle up to 4.1.17/4.3.11/4.4.7/4.5.3. Affected by this vulnerability is an unknown functionality of the component Messaging Web Service. The manipulation leads to authorization. This vulnerability is documented as CVE-2025-3645. The attack can be initiated remotely. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Moodle up to 4.1.17/4.3.11/4.4.7/4.5.3. It has been rated as problematic. This issue affects an unknown functionality of the component Messaging Web Service. 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 summary by CVE is:

A flaw was found in Moodle. Insufficient capability checks in a messaging web service allowed users to view other users' names and online statuses.

It is possible to read the advisory at access.redhat.com. The identification of this vulnerability is CVE-2025-3645 since 04/15/2025. The exploitation is known to be easy. The attack may be initiated remotely. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 06/24/2025).

Upgrading to version 4.1.18, 4.3.12, 4.4.8 or 4.5.4 eliminates this vulnerability.

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

Productinfo

Type

• Learning Management Software

Name

• Moodle

Version

• 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
• 4.1.11
• 4.1.12
• 4.1.13
• 4.1.14
• 4.1.15
• 4.1.16
• 4.1.17
• 4.3.0
• 4.3.1
• 4.3.2
• 4.3.3
• 4.3.4
• 4.3.5
• 4.3.6
• 4.3.7
• 4.3.8
• 4.3.9
• 4.3.10
• 4.3.11
• 4.4.0
• 4.4.1
• 4.4.2
• 4.4.3
• 4.4.4
• 4.4.5
• 4.4.6
• 4.4.7
• 4.5.0
• 4.5.1
• 4.5.2
• 4.5.3

License

• open-source

Website

• Product: https://moodle.org/

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