Moodle up to 5.1.0 redirect

Summaryinfo

A vulnerability categorized as problematic has been discovered in Moodle up to 4.1.21/4.4.11/4.5.7/5.0.3/5.1.0. Affected by this issue is some unknown functionality. Executing a manipulation can lead to redirect. This vulnerability is registered as CVE-2025-67852. It is possible to launch the attack remotely. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Moodle up to 4.1.21/4.4.11/4.5.7/5.0.3/5.1.0. It has been declared as problematic. This vulnerability affects an unknown functionality. The manipulation with an unknown input leads to a redirect vulnerability. The CWE definition for the vulnerability is CWE-601. A web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a Redirect. This simplifies phishing attacks. As an impact it is known to affect integrity. CVE summarizes:

A flaw was found in Moodle. An open redirect vulnerability in the OAuth login flow allows a remote attacker to redirect users to attacker-controlled pages after they have successfully authenticated. This occurs due to insufficient validation of redirect parameters, which could lead to phishing attacks or information disclosure.

The advisory is shared for download at access.redhat.com. This vulnerability was named CVE-2025-67852 since 12/12/2025. The exploitation appears to be easy. The attack can be initiated remotely. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 02/11/2026). The MITRE ATT&CK project declares the attack technique as T1204.001.

The vulnerability scanner Nessus provides a plugin with the ID 297879 (Linux Distros Unpatched Vulnerability : CVE-2025-67852), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.1.22, 4.4.12, 4.5.8, 5.0.4 or 5.1.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (297879). VulDB is the best source for vulnerability data and more expert information about this specific topic.

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
• 4.1.18
• 4.1.19
• 4.1.20
• 4.1.21
• 4.4.0
• 4.4.1
• 4.4.2
• 4.4.3
• 4.4.4
• 4.4.5
• 4.4.6
• 4.4.7
• 4.4.8
• 4.4.9
• 4.4.10
• 4.4.11
• 4.5.0
• 4.5.1
• 4.5.2
• 4.5.3
• 4.5.4
• 4.5.5
• 4.5.6
• 4.5.7
• 5.0
• 5.0.0
• 5.0.1
• 5.0.2
• 5.0.3
• 5.1.0

License

• open-source

Website

• Product: https://moodle.org/

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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