Moodle up to 4.1.15/4.3.9/4.4.5/4.5.1 authorization

Summaryinfo

A vulnerability identified as problematic has been detected in Moodle up to 4.1.15/4.3.9/4.4.5/4.5.1. This affects an unknown function. The manipulation leads to authorization. This vulnerability is documented as CVE-2025-26531. The attack can be initiated remotely. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Moodle up to 4.1.15/4.3.9/4.4.5/4.5.1. It has been rated as problematic. This issue affects some unknown functionality. 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 integrity. The summary by CVE is:

Insufficient capability checks made it possible to disable badges a user does not have permission to access.

It is possible to read the advisory at moodle.org. The identification of this vulnerability is CVE-2025-26531 since 02/12/2025. The exploitation is known to be difficult. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. 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 08/21/2025).

The vulnerability scanner Nessus provides a plugin with the ID 253371 (Linux Distros Unpatched Vulnerability : CVE-2025-26531), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.1.16, 4.3.10, 4.4.6 or 4.5.2 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (253371). Be aware that VulDB is the high quality source 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
• 4.3.0
• 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
• 4.4.0
• 4.4.1
• 4.4.2
• 4.4.3
• 4.4.4
• 4.4.5
• 4.5.0
• 4.5.1

License

• open-source

Website

• Product: https://moodle.org/

CPE 2.3info

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CPE 2.2info

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

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