Moodle Project up to 5.3.0 core_grades get_feedback.php core_grades_get_feedback userid information disclosure

Summaryinfo

A vulnerability described as problematic has been identified in Moodle Project Moodle up to 4.5.15/5.0.11/5.1.8/5.2.4/5.3.0. Affected by this vulnerability is the function core_grades_get_feedback of the file public/grade/classes/external/get_feedback.php of the component core_grades. The manipulation of the argument userid results in information disclosure. This vulnerability is known as CVE-2026-119555. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability was found in Moodle Project Moodle up to 4.5.15/5.0.11/5.1.8/5.2.4/5.3.0. It has been classified as problematic. Affected is the function core_grades_get_feedback of the file public/grade/classes/external/get_feedback.php of the component core_grades. The manipulation of the argument userid with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality. CVE summarizes:

Moodle 4.2.0 through 4.5.15, 5.0.0 through 5.0.11, 5.1.0 through 5.1.8, 5.2.0 through 5.2.4, and 5.3.0 contain an information disclosure vulnerability in the core_grades_get_feedback web service. The service lacks group-membership and enrolment checks, so non-editing teachers can iterate userid values to read other groups' grade feedback and users' names and identity fields such as email.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-119555 since 10/30/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 10/30/2026). The MITRE ATT&CK project declares the attack technique as T1592.

By approaching the search of inurl:public/grade/classes/external/get_feedback.php it is possible to find vulnerable targets with Google Hacking.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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

Productinfo

Type

• Project Management Software

Vendor

• Moodle Project

Name

• Moodle

Version

• 4.5.0
• 4.5.1
• 4.5.2
• 4.5.3
• 4.5.4
• 4.5.5
• 4.5.6
• 4.5.7
• 4.5.8
• 4.5.9
• 4.5.10
• 4.5.11
• 4.5.12
• 4.5.13
• 4.5.14
• 4.5.15
• 5.0
• 5.0.0
• 5.0.1
• 5.0.2
• 5.0.3
• 5.0.4
• 5.0.5
• 5.0.6
• 5.0.7
• 5.0.8
• 5.0.9
• 5.0.10
• 5.0.11
• 5.1
• 5.1.0
• 5.1.1
• 5.1.2
• 5.1.3
• 5.1.4
• 5.1.5
• 5.1.6
• 5.1.7
• 5.1.8
• 5.2
• 5.2.0
• 5.2.1
• 5.2.2
• 5.2.3
• 5.2.4
• 5.3.0

License

• open-source

CPE 2.3info

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CPE 2.2info

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